Cryptographic Patents
© Brooke Clarke, N6GCE 2003 - 2005
This is the precursor to the Enigma
Patent Classes
In this section when a title is a link
it goes to the USPTO web page describing the top class. There you
can see the hierarchy of the classes, that are not so clear below.
When a class number is a link it takes you to a list of all patents in
that class. There are many more listed there than here.
327
-
Miscellaneous
Active Electrical Nonlinear Devices, Circuits, and
Systems
164
- Generating rectangular (e.g., clock, etc.) or pulse waveform having
random characteristic (e.g., random width, etc.)
380
Cryptography
26
- Having mechanical control of signal encryption (e.g., cam) 119 pats
27
- By perforated record 77 pats
28
- Particular Algorithmic Function Encoding 636 pats
29
- NBS/DES algorithm 257 pats
30
- Public key 756 pats
33
- Using plural paths or channels
37
- Block/data stream enciphering 212 pats
38
- Frequency shift or inversion 121 pats many speech scramblers here
39
- Having plural band pass filters 95 pats
40
- Having plural band pass filters 49 pats
41
- Having quantizing and subsequent normalizing of signal (e.g., reentry
telephone circuitry) 48 pats
42
- Data stream/substitution enciphering 157 pats
43
- Key sequence signal combined with data signal 255 pats
45
- Multiple key level 162 pats
46
- Nonlinear (e.g., pseudorandom) 487 pats
47
- Plural generators 155 pats
51
- Having production of printed copy (e.g., printer, typewriter)
52
- Including particular structure or housing (e.g., display, keyboard)
54
- By Modifying Optical Image (e.g., Transmissive Overlay) 322 pats
55
- Having Production of Printed Copy (e.g., Cryptographic Printer or
Typewriter) 161 pats
56
- Selectively Movable Element having Code Characters 47 pats
57
- Rotatable 54 pats
58
- Characters on peripheral surface (e.g., cylinder section) 32
pats
252
- Electrical Signal Masking 135 pats
253
- By signal having discrete frequency component 50 pats
254
- By signal having discrete step amplitude variation 33 pats
255
- Communication System using Cryptography 169 pats
260
- Symmetric key synchronization 125 pats
262
- Transmitting a seed, sequence, or initial value 179 pats
265
- Combining outputs of shift register 76 pats
274
- Synchronization 100 pats
275
- Speech scrambler detail 97 pats
277 -
280 -
284 -
400
Typewriting
Machines
89
- Key Reassignment
90
- Electrically powered
708
Electrical
Computers: Arithmetic Processing and Calculating
100 Electrical
Digital Calculating Computer
250
- Random number generation 289 patents
713
Electrical
Computers and Digital Processing Systems: Support
150
- Multiple Computer Communication using Cryptography 166 pats
151
- Protection at a particular protocol layer 99 pats
169
- Mutual entity authentication 147 pats
171
- Having key exchange 215 pats
181
- Message digest travels with message 142 pats
1800
253061
Apparatus for Preparing and Transmitting Secret Telegraphic Messages
Jan
31
1832 A F & F B Johnson
178/92; 83/202; 178/4;
178/17R; 178/37;
380/26
- indentions on paper tape rather than printed characters.
Precursor
topunched paper tape. Little security since a skilled person
could
read the code.
420262
Mixer
366/247; 210/251; 210/466; 220/568; 222/192;
380/54
- beverage mixer
1210656
Apparatus for Coding and Decoding Jan 2, 1917 S M Kintner 380/26;
380/51;
400/77 - fixed subistution alphabet for teletype type machines
1233035 Apparatus for Producing a Series of Signs, A.G. Damm, Jul 10
1917,
380/58 - A-21 ?
1244477
Telegraphy Oct 30, 1917 P.B. Delany
380/255; 178/98;
380/38
a public sounder with inverted singals to preventlistening to message
1310719
Secret Signaling System, G.S. Vernam, July 22, 1919,
380/33 ;
380/259; 380/26
Class 380/33 is for crypto systems that
transmit the message using a plurality of paths, yet that's not how it
works. This is just a One Time Pad.
1312572
Secret Signaling System Aug 12 1919
380/43;
380/260
R D Parker - Morse code is broken up using a distributor
1320908
Ciphering and Decyphering Mechanism Nov 4, 1919 380/27 R. D. Parker -
paper
tape
W.W. I 1914 - 1911
1920
1356546
Cyphering System Oct 26, 1920 380/47
L F Morehouse (AT&T)- Two 5 level paper tapes
1414496
Cryptographic Typewriter May 2 1922 P G G Beyer 380/51;
400/71; 400/184 - single rotor turns one step with each key press
1415106
Cyphering Device May 9 1922 380/27; 380/51; 380/267 L F Morehouse
(AT&T)
- improves on 1320908 by not encyphiring the control characters, makes
for
a legiable printout
1416765
Cyphering Device May 23 1922 380/27 G S Vernam (AT&T) - filed Jan
1920,
paper tape
1426699
Cyphering Device Aug 22, 1922 380/27 R E Pierce (AT&T) -
paper
tape
1484477
Apparatus for Ciphering and Deciphering Code Expressions, A.G. Damm,
Feb 19 1924, 380/55 ; 101/486; 101/85
1491358
Enciphering Machine April 22, 1924 380/27; 380/51; 400/73; 400/90
paper tape
1510441
Electric Coding Machine Sep 30, 1924 E. H. Hebern 380/51; 400/77
1516180
Secret Signaling System Employing Apparatus for Automatically
Encyphering
and Decyphering Messages Nov 18, 1924 380/27;
380/47 W. F. Friedman - paper tape
1520089 Electric Typewriting Machine, A. Scherbius, Dec 23 1924, 400/45
; 101/94; 400/155; 400/163.2
1522044
Secret Communication System June 6, 1925 R. Brown - speech frequency
inversion 380/38
1522775
Secret Signaling System Employing Apparatus for Automatically
Encyphering
and Decyphering Messages Jan 13, 1925 380/27; 380/47 W. F. Friedman -
paper
tape
1523689
Coding and DEcoding Machine, S Hole, Jan 20, 1925, 380/55 ; 235/201ME;
400/181; 400/77
1533252
Coding and Decoding Machine H.A. Koch Apr 14, 1925 - pneumatic 380/51
; 400/176
1540107
Apparatus for the Production of Cipher Documents especially for
Telegraphic Dispatch AG Damm 380/52 ; 400/474; 400/77
1542567
Secret Signaling June 16, 1925 R.C. Mathes voice frequency subbands
& multiple channels 380/34; 380/38
1556964 Electric Ciphering Apparatus, A. Scherbius, Oct 13 1925, 380/51
-
1584660 Ciphering Device, A. Scherbius, May 11 1926, 380/51 ;
400/158; 400/259; 400/261
1633625
Sycercy System June 28 1927 380/28 (AT&T) - telephone
scrambler
using controlled distortion
1643546
Apparatus for Deciphering Cipher Messages, A.G. Damm, Sep 27 1927
1644239
Apparatus for Producing a Series of Signs Damm Oct 4, 1927 380/58
- A-21?
1657411 Ciphering Machine, A. Scherbius, Jan 24 1928, 380/52 ;
234/96; 380/261; 380/267; 380/51
1683072
Electric Code Machine E. H. Hebern, Sep 4, 1928 380/52;
341/2; 380/58 (pre enigma) rotors, keyboard and lights
The machine shown on
Jerry's page may
be a prototype of this one?
1724163
400/365; 181/201; 400/90; 400/689; 400/690 quiet
electric typewriter
1726578
- Secret Telephone System - Sep 23, 1929 Harry Nyquist - add a time
delay
proportional to frequency to make unintelligable
1930
1744347
Coding Machine Kryha Jan 21, 1930 380/57 ; 380/58
1834278 Device for Insuring Privacy of Reception of Printing Telegraph,
Parker Hitt (International Communications Labs), Dec 1 1931, 178/37
; 178/42
Just conceals the printing on the paper
strip from the delivery boy by rolling it up.
1846105
Ciphering Apparatus Hagelin Feb 1932 380/55 - Model B-21
1848291 Ciphering and Deciphering Apparatus, Parker Hitt
(International Communication Labs), Mar 8 1932, 380/26 ;
370/298; 380/51 - printing telegraph
1861857 Cryptographic Machine, E.H. Hebern (International Code Machine
Co), Jun 7 1932, 400/90 ; 400/217; 400/33; 400/364; 400/422;
400/615.2; 400/621; 400/621.1; 400/685; 400/691; 400/88
closer to Enigma
1952246 Arrangement for the Feeding of Gaseous Tubes, Hagelin, Mar 27
1934, 315/256 ; 315/228 - Lighting or crypto?
1953918
Cryptographic System and Apparatus April 10, 1934 J.I. Bellamy 380/42
instead of a digraphic cipher, 4 letters are automatically used
1956384
Pocket Cryptographic Apparatus, April 24, 1934, A. Gentet 380/56
-aka the Sphinx strip ciper device.
1984599
Educational Device Safar Dec 1934 434/228 ; 315/313; 340/332
2013671
Electrical System and Apparatus for Transmitting Intelligence Sep
10, 1935
2028508 Ciphering Apparatus, Parker Hitt (International Communication
Labs), Jan 21 1936, 380/55 ; 400/478- typewriter that
automatically spaces 5 letter groups
2028772
Cryptographic System Jan 28, 1936 Friedman 380/26 ; 380/51 -
rotors
2042116 Mechanical Movement, R.K. Morris, May 1926, 74/143 ;
235/91R; 74/144; 74/151; 74/153 -
2056284
Signaling Means and Apparatus Oct 6, 1936 LeRoy A. MacColl 380/252;
178/63R; 178/69B; 307/106; 380/46 paper tape
2089603
Ciphering Machine Hagelin Aug 1937 380/55 ; 380/58; 400/162;
400/83; 400/88 - model C-35 first in the C series which
resulted in the M-209
2098956
Signaling System Dudley, Nov 16, 1937 380/36 ; 379/414; 704/205
- multiple circuit split frequency
2116683
Coding and Decoding Machine WS Lemmon 380/55 ; 400/373; 400/474;
400/477 -
2116731
Coding and Decoding Machine AR Noll 380/55 ; 400/474;
400/478; 400/479; 400/77
2125995
Ciphering Machine R.W. Doidge Aug 9, 1938 380/26
2139676
Cryptographic Apparatus Friedman Dec 1938 380/26 - Enigma like
2140424
Cryptographic Device Friedman Dec 13 1938 380/57
- 29 tooth gear meshing with 40 tooth gear
2151091
Signal
Tansmission H.W. Dudley March 21, 1939 (filed 1935) 380/39;
84/701; 84/DIG11; 324/76.12; 324/76.29; 379/414; 704/205; 704/206;
704/209 - a vocoder used to compress speach to about 500 Hz bandwidth
2183248
Wave Translation, RR Riesz, Dec 12, 1939 381/61 ; 333/28R;
380/39; 472/64; 704/205 - also see 3012098
1939 - 1945 W.W. II
1940
2206590
Portable Transmissin System, Webb Jr., Jul 2, 1940 - simble speech
inverter
2330049 Positive Detent, Hagelin, Sep 21 1943, 192/215
2373890
Cipher Machine E. H. Hebern April 17, 1945 380/51; 400/77; 400/473;
400/474
2394765 Ciphering and Deciphering Mechanism, Hagelin, Feb 12 1946, 380/26
2401402
Secret Communication System 380/28 - June 4, 1946 (RCA) - voice by
using
a record (or photographic image) as a key
2402182
Rotor, L. Rosen Jan 18, 1946 L. Rosen 380/26; 380/33;
380/58 - contact pressure is relieved during rotation to minimize wear
2437255
Graphic Privacy System March 9 1948 J V L Hogan 380/54; 355/42;
355/52;
380/37; 380/243; 380/245
2247170
Ciphering Machine Hagelin June 1941 380/55 ; 400/162; 400/89 -
model BC-38 based on the C-38
2265715
Cipher Apparatus H. S. Bacon Dec 9, 1941 380/27; 400/90
2411206
Electrical Signalling Method, Guanella, Nov 19, 1946 380/39 ;
380/38 - Original
permuting sub bands, but they can have different bandwidths
1950
1950 - 1953 Korean conflict (aka Police Action)
2510338
Means of and Method for Scrambling Speech Signals, Guanella, Jun 6,
1950 380/39 - sub bands enchnced
2513307 Coding Means and Method, R.E. Gilman (IBM), Jul 4 1950, 380/26
-
Calls:
50946 Improvement in Signals, Albert J. Myer, Nov 14
1865,
380/57- Cipher Disk
1510441
Electric Coding Machine Sep 30, 1924 E. H. Hebern
380/51; 400/77
1683072
Electric Code Machine E. H. Hebern, Sep 4, 1928
380/52;
341/2; 380/58 (pre enigma rotor machine)
1953829 Apparatus for Cryptographically Transposing Characters, R.K.
Morris, Apr 3 1934,
380/55 ; 200/11A; 439/49; 74/142
2413592 Coding and Decoding Chart for Cryptography, Charles B.
Strother, Dec 1946, - sliding strips
2425518 Ciphering Apparatus, C.R. Doty (IBM), Aug 12 1947,
380/27
; 400/330.3; 400/373; 400/474; 400/477; 400/71
2530579
Speech Inverter, L Koros, Nov 21, 1950 380/39
; 332/153; 332/155
2547515 Secrecy System, W.J. Zenner (Teletype), Apr 3 1951,
Calls:
1310719
Secret Signaling System, G.S. Vernam, July 22, 1919,
380/33 ;
380/259; 380/26
1522775
Secret Signaling System Employing Apparatus for Automatically
Encyphering
and Decyphering Messages Jan 13, 1925 380/27; 380/47 W. F. Friedman -
paper
tape
2405569 Cryptographic Telegraph System, K.E. Fitch (Bell), Aug 13 1946,
380/27 ; 380/43- 5 level TTY
2406829 Telegraph System, H.H. Haglund (WU), Sep 3 1946,
380/43
2709218
Method and Means for Anti-Jamming in Radio, Gabrilovitch, May 24, 1955 455/45
; 380/39; 455/1; 455/196.1; 455/48; 455/63.1
2765364
Keying Mechanism Hagelin Oct 1956 380/59 ; 380/55; 400/478; 400/89 -
experimental model C-36
2802047 Electric Swithing Device for Ciphering Apparatus, Hagelin, Aug
6 1957, 380/26 ; 380/51; 400/89 - looks like KL-7
Talks about teleprinters and the need
to NOT encipher the <CR> and <LF> but do cipher <Fig>
and <Chr> also talks about "telegraph impulse system (baudot) and
multicircuit systems (one wire per character).
Calls:
1683072 Electric Code Machine E. H. Hebern, Sep 4, 1928
380/52;
341/2; 380/58 (pre enigma rotor machine)
2402182 Rotor, L Rosen, Jan 18, 1946 L. Rosen 380/26; 380/33; 380/58
Called by:
2917579 Ciphering Machines, Hagelin, Dec 15 1959,
380/26 ;
341/78; 341/81
3214518 APPARATUS FOR CODING AND DECODING TELEPRINTER MESSAGES,
Fritz Butzke (Siemens & Halske), Oct 26 1965, -
Reads input tape in two positions
seperated by n characters and combines them into a single output
character. That output character is combined with a key tape
character to generate the final output.
3657699 Programmable cryptic device for enciphering and deciphering data,
Harold S. Richard et al (NCR), Jan 18 1977 - aimed at credit cards and ATMs
4275265 Complete substitution permutation enciphering and deciphering circuit,
George I. Davida et al - allows for a 128 bit key and certainty that all circuits are complete -
an upgraded DES type cipher
2855514
Gaseous Discharge R.F. Noise Source Oct , 1958 331/78; 313/633;
327/164;
327/601; 333/24R (up to 4.5 GHz)
2877565
Electrical Cryptograph, Friedman (M-325) 380/52
2896071
Security Communication System, July 21, 1959 380/39
; 341/173; 380/260; 380/275 - synch signal embedded in message
2917579 Ciphering Machines, Hagelin, Dec 15 1959, 380/26 ;
341/78; 341/81 -
Calls:
1652708 Permutation Switch, Leeuw, Dec 13 1927,
439/189 ;
200/42.02; 439/488
1663624 Electric Apparatus, A.G. Damm, Mar 27 1028,
380/26
Calls:
1502376 Production of Ciphers, A.G. Damm, Jul 22 1924, 380/52 ;
400/474; 400/77 -
1540107 Apparatus for the Production of Cipher Documents Especially for
Telegraphic Dispatch, A.G. Damm, Jun 2 1925, 380/52 ; 400/474;
400/77
1905593 Coding Machine, W. Korn, Apr 25 1933,
380/26
1953829 Apparatus for Cryptographically Transposing Characters, R.K.
Morris, Apr 3 1934,
380/55 ; 200/11A; 439/49; 74/142
2529487 Rotor Assembly, V.E. Cooley, Nov 14 1950,
380/26 ; 200/9
2753034 Coding Machine, R. Hell, Jul 3 1956,
380/27 ; 380/51
2777556 Power-Driven Ciphering Devices, Hagelin, Jan 15 1957,
380/51
2802047 Electric Switching Device for Ciphering Apparatus, Hagelin, Aug
6 1957,
380/26 ; 380/51; 400/89
1960
1961 - 1975 Vietnam era
2934833 Enciphering Device, F. Burkhard, May 3 1960, 380/26
2941036 Electrical Signal Scrambling and Unscrambling Apparatus, W.
Honolka,
3006081
Encoding Keying Device Nyberg Oct 31, 1961 380/59 ; 380/57
3046545
Rapid Correlation Echo Ranging System July 24, 1962 342/189;
342/195; 367/100; 370/521 - Pseudo Random Generator
3083263 Auxiliary Apparatus for Teletypers, Hagelin, Mar 26 1963, 380/2
; 380/33- CCIT 2
3124748
Secret Signaling Systems Mar 10, 1964, 380/32 ; 380/34; 380/39
mixing voice bands with changing oscillator
3163809
Random Noise system for Vibration Testing Dec 29, 1964 318/132;
73/579; 327/164; 330/103; 330/126; 331/78
Photomultiplier generates noise and a lamp is used in the feedback
circuit
3171089
Diode Random Noise Generator Feb 23, 1965 331/78; 327/164;
327/584 avalanche diode in reverse breakdown
3204035
- 370/208; 375/362 Orthonormal Pulse Multiplex Transmissions Systems 26
Nov
1962
3328526
Speech Privacy System Schroeder, Jun 27, 1967 380/39
; 369/26.01; 455/39 - uses the sub band amplitudes to modulate the
phase of that freq. all the subbands are send at equal amplitude.
see Dudley vocoder 2151091
3349882
Ciphering Machine Florin et al Oct 31, 1967 380/57
; 400/162 - M209 like
3439279
- Synchronizing System for Random Sequence Pulse Generators April 15,
1969
3485948 Perforated Tape Accessory Apparatus for a Ciphering Machine,
Hagelin, Dec 23 1969, 380/27 ; 341/95
3614316
Secure Communication System Oct 17, 1971(filed 1964) Secretary of the Navy
380/47;
375/150;
380/34;
380/46
An improved secure communication system
comprising: A first and a second pseudorandom noise generator, said
generators having,respectively, a first and a second shift register,
each register having N stages and having logical circuit means for
randomly recirculating binary bits through the
register for generating a random repeatable pattern of binary bits, A
reset
pulse source coupled to all stages of said first register to reset said
first
register to a predetermined starting binary number, A starting point
switch
matrix comprising N logical zero-one switches connected, respectively,
between
the stages of said second register and said reset pulse source, Means
for
feeding a binary information number to said switches to reset said
second
register to a starting point a predetermined number different from the
starting
binary number of said first register, Transmitting means for
transmitting
said pseudorandom noise generators outputs connected to the outputs of
said
pseudorandom noise generators; Receiving means for receiving said
transmitting
means transmissions, said receiving means having an output; Recycling
storage
means connected to the output of said receiving means for storing the
receiving
means output signals; A third pseudorandom noise generator identical in
sequence
to said first and second pseudorandom noise generators having an output
and
a reset input, said receiving means output connected to said reset
input;
A correlator having a first input connected to said storage means and a
second
input connected to said third pseudorandom noise generator output for
generating
a signal upon correlation of said storage means output and said third
pseudorandom noise generator output, and; Timing means connected to
said correlator for timing the interval between outputs thereof.
Relates to SONAR.
3618077
Walsh Function Generator - Nov 2, 1971
3639690
Digital
Privacy System - Feb 1, 1972 Motorola
3651404
Voice Privacy Adapter - March 21, 1972 frequency inversion - Motorola 380/39
; 332/168
3678204
- 177/15; 370/209 Signal Processing and Transmission by means of Walsh
Functions 26 Oct 1970 ITT
3701143
Walsh Function Generator -
3723878
Voice Privacy Device, Miller, Mar 27, 1973 380/39
; 380/275; 380/44 - additions to inverter
3742201
- 708/410 Transformer System for Orthogonal Digital Waveforms June 26,
1973
3746799
Method and Apparatus for Encoding and Decoding Analog Signals
-
3749832
Binary Coded Signal and Ciphering and Deciphering Method and Systems
Embodying
Same July 31 1973 380/28; 341/95; 380/37
3766316
Frame Synchronization Detector -
3777064
Voice Privacy System, US Navy, Dec 4, 1973 380/39
- uses active RC low pass filters instead of LC or active LC
filters. uses "Weaver
modulator"
3781472
Digital Data Ciphering Technique, G.E. Goode (Datotek), Dec 25 1973, -
electronic TTY
3781473
Random Digital Code Generator, G.E. Goode (Datotek), Dec 25 1973, 380/46
- electronic TTY
3795864
- Methods and Apparatus for Generating Walsh Functions -
3798359
(Lucifer) Block Cipher Cryptographic System 380/37 ; 380/28;
380/29; 380/46
3808536
Communications
Scrambler System 380/45;
375/141; 380/46; 380/47- A scrambler system in which amplitude
zero-crossings in speech are encrypted at a transmitter by combination
with a pseudo-random digital sequence, the reverse process occurring at
the receiver. The amplitude envelope need not be encrypted, but if
desired, can be encrypted by combination with a further pseudo-random
digital sequence. A higher level of scrambling can be achieved in the
transmitted signal by using the conjugate of the amplitude
envelope. With a sequence bit rate of about two kilobits per
second,
there is no increase in bandwidth requirements compared to the
transmission
of unscrambled speech. Thus standard transceivers can be employed, and
pre-existing
ones readily modified for scrambling and unscrambling.
3859515
- 708/410; 324/76.12; 324/76.21; 340/5.81; 382/121 Method and Apparatus
for
Signal Spectrum Analysis by Hadamard Transform Jan 7 1975 Burroughs
3886313 Voice security method and system
Datotek, May 27, 1975 380/40 ; 341/181; 380/39
3893031
Synchronization System for Voice Privacy Unit filed Nov 8,
1972 granted July 1, 1975 Henry L. Majeau, Boeing
Company, 380/274;
340/146.2;
380/44;
380/262;
380/275
- uses 3 tones for synchronization like the KY-57 - A system for
synchronizing the operation of two
or more voice privacy units. At least one otherwise "clear" tone is
modulated by a statistically random signal known as a Barker word, this
tone
then being mixed with the audio signals and transmitted. The modulation
is
present for a very short time, the conclusion of the modulation
initiating the operation of a code generator which scrambles the
succeeding audio signals. The recognition of the reception of the
modulated tone at the receiver initiates the operation of its code
generator (at the conclusion of the modulation), thereby recovering the
original plaintext speech. This is a form of speech inversion
3909534
Voice privacy unit for intercommunication systems -
3920894
Pseudo-Random Parallel Word Generator
3934078
Key Generating System, D.K. Gannett (Bell Labs), Jan 20 1976 (Filed May
1 1946) , 380/47 ; 331/78; 380/41 - Sig Sally?
3936748 Secret communication system employing magnetic control of
signal, Hans A. Bomke (Army), Feb 3 1976 (filed: Sep 10 1956), 380/59
; 359/281; 398/183 - Faraday effect
Optical or microwave signal has
polarization plane rotated
3936749
Matched filter communication systems, Ernst A. Guillemin (Army), Feb 3
1976 (filed: Jun 23 1961), 375/260 ; 375/240; 375/270; 375/343;
380/34; 380/40 - SSB signal
3937888
Signal transmission with secrecy, Oscar Myers (Bell Labs), Feb 10 1976
(filed Jun 17 1943), 380/22 ; 380/35 - select one of 6 time
delays for voice signal
3944744 Matrix Coding Secret Signaling System, D.K. Gannett
(Bell Labs), Mar 16 1976 (filed: May 10 1945), 380/41 - Sig
Sallay?
3944745
Secret signaling system with means for preventing key Disclosure,
Danforth K. Gannett (Bell Labs), Mar 16 1976 (filed: May 10 1945), 380/41
- Sig Sallay?
3962539 (DES)
Product block cipher system for data security 380/29 ; 380/37;
713/150
3965296 Signaling System, R.L. Miller (Bell Labs), Jun 22
1976 (filed: Jun 30 1944), 380/41- Sig Sallay?
3965297 Secret communication signal generating system, D.K.
Gannett (Bell Labs), Jun 22 1976 (filed: May 1 1946, 380/41 ;
331/78 - Sig Sallay?
3967067
Secret telephony Filed: Sep 24, 1941 Pat Date June 29, 1976 380/41;
380/40;
704/205
Part of the SIGSALY
W.W. II Voice system
3968454
Signaling circuit, A.J. Busch (Bell Labs), Jun 6 1976 (filed: Sep 27
1944), 331/78 ; 380/41; 380/47 - 17, 14, 13 stages TTY?
3976839
Telephone privacy system, R.L. Miller stem for data security 380/29
; 380/37; 713/150
3965296 Signaling System, R.L. Miller (Bell Labs), Aug 24
1976 (filed: Jun 30 1944), 380/41 ; 370/500 - Sig Sallay?
3979558
Signaling system, E. Peterson (Bell Labs), Sep 7 1976 (filed: Jun 30
1944), 380/41- Sig Sallay?
3983326
Key pulse generator for secrecy signaling circuit, Sep 28 1976 (filed:
Sep 27 1944), 380/41 ; 331/78 - Sig Sallay?
3983327
Electrical signaling, D.K. Gannett (Bell Labs), Sep 28 1976 (filed: Jul
9 1945), 380/41 - Sig Sallay?
3984922
Rotors, Leo Rosen, Oct 12 1976, 380/26
3985958
Secret telephony
Filed: Dec 18, 1941 Pat:
Oct 12, 1976 Part of the SIGSALY W.W.
II Voice system
3991271
Voice security method and system - analog
3991273
Speech component coded multiplex carrier wave transmission
Filed: October 4, 1943 Pat:
Nov 9, 1976 Part of the SIGSALY W.W.
II Voice system
3995115
Speech privacy system
Bell Labs Nov 30, 1976 380/32 ; 380/275; 380/39;
704/205 Vocoder & removing fund freq
4013837
Voice security method and system - analog
4020285
Voice security method and system - analog
4052565
- Walsh function signal scrambler, D.D. Baxter (Martin Marietta), Oct 4
1977, 380/28 ; 370/503; 375/142; 375/238; 375/242; 375/353;
375/367; 380/275; 380/31; 708/410
4079188
Multi-mode digital enciphering system
4115657
Random digital code generator - digital multiple registers with
relativity prime lengths
4126761
Method of and means for processing an audio frequency signal to conceal
intelligibility -
4133973
Digital cryptographic system having synchronous and asynchronous
capabilities
4133974
System for locally enciphering prime data - digital key generator using
a
register and addressable memory
4140873
Multi-mode digital enciphering system
4145568 Method and apparatus for ciphering and deciphering messages
380/47; 380/44; 380/260; 380/277 Pat: March 20, 1979 Filed: October 6,
1964
4145569 Method and apparatus for synchronizing the ciphering and
deciphering of binary-coded messages
380/262; 380/47 Pat:
March 20, 1979 Filed: December 22, 1964
4149035
Method and apparatus for enciphering and deciphering audio
information
-
4154006
Coding and decoding machine
Wood; Chester C,
May 15, 1979 380/57 ; 341/2 -
4155659 Printing and coding machine, Edward S. Larson, Carl A. Levin,
Rolf A. Thienemann (Navy), May 22 1979 (filed: Feb 5 1940), 380/55
- SIGABA?
4156314
Rotors for a ciphering machine 380/26; 380/51; 439/43 Pat:
May 29, 1979 Filed: February 21, 1944 Rosen; Leo 26 contacts
not KL-7 and not used in any U.S.
crypto machine
4157453 Cryptographic telegram transmission system 380/36 Pat:
June 5, 1979 Filed: October 10, 1944 Rosen; Leo
4157454 Method and system for machine enciphering and deciphering
June
5, 1979 380/37; 380/42; 380/45 (IBM) -
4166922
Multi-mode digital enciphering system with repeated priming sequences
4168395 Start/stop teleprinter scrambler
380/35; 380/43
4167700
Digital voice protection system and method -
4169212
Multi-mode
digital enciphering system
4170714
Digital cryptographic system and testing thereof - digital data
4172968 Electrical system
380/43; 380/261; 380/275 digital voice encryption
4176316 Secure single sideband communication system using modulated
noise subcarrier
380/34
1980
Berlin Wall 1961 - 1989
4183088 Random number generator
708/250; 331/78
4184117 Communication security method and system
380/34; 380/35; 455/46
4185166
Multi-mode digital enciphering system - digital: off line, asynchronous
or
synchronous data
4185928 Printer for electric coding machines
380/55
4188580
- Secure communication system- 380/254;
375/145
4195202
Voice privacy system with amplitude masking -
4200770
- (Public Key) Cryptographic apparatus and method
April 29, 1980 380/30; 380/44; 380/285; 713/169; 713/171
4217469
- Coding and decoding apparatus for the protection of communication
secrecy 380/27; 380/36 time delay
4218582 (Trapdoor
flawed)Public key cryptographic apparatus and method 380/30 ;
713/168; 713/170
4229817
Portable electronic cryptographic device - alpha numeric digital keypad
&
display
4232194
Voice encryption system,
Adams, Nov 4, 1980 380/28 ; 380/257; 380/275; 380/39;
704/205 - using DSP methods to provide more sub bands
4244053
Privacy communication method and system -
4268720
Scrambler speech transmission and synchronization system -
4276652
Secure communication system with improved frequency-hopping arrangement
-
variable BFO
4278840
Dynamic frequency and time voice encryption system and method - analog
4309569 (tree
authentication) Method of providing digital signatures 713/177
; 340/5.8; 713/180; 902/2; 902/5
4316055
- Stream/block cipher cryptographic system February 16, 1982 380/37;
380/43; 380/45
4341925
- Random
digital encryption secure communication system - combine two PR
code streams
4349695
Recipient and message authentication method and system - two way pass
& CRC at end
4351982
RSA Public-key data encryption system having large random prime number
generating microprocessor or the like
September 28, 1982 380/30; 380/282; 380/285 (Racal-Miglo
Datacryptor64)
4386233 Cryptographic key
notarization methods and apparatus 380/281 ; 380/280; 380/45;
713/155; 713/180; 902/2; 902/5
4392021
Secure facsimile transmission system using time-delay modulation - FAX
4405829
(RSA) Cryptographic communications system and method Sep 20, 1983 380/30;
380/255; 713/150; 713/151 (Racal-Miglo Datacryptor64)
4424414 Exponentiation
cryptographic apparatus and method
380/30 ; 380/285; 380/44; 713/171
4433211
Privacy communication system employing time/frequency transformation
4434322
Coded data transmission system Feb 28, 1984 380/43; 380/44;
380/265 (Racal-Miglo Datacryptor64)
4567600 Method and apparatus for
maintaining the privacy of digital messages conveyed by public
transmission 713/174 ; 380/278; 380/285; 380/33
4625076 (ESIGN
signatures) Signed document transmission system 713/176 ;
380/30; 713/180
4633036
(Prime 3 Gen)Method and apparatus for use in public-key data encryption
system 380/30 ; 380/277; 902/2
4748668
Method, apparatus and article for identification and signature 380/30
; 380/28
4754482
Method and apparatus for synchronizing encrypting and
decrypting
systems June 28, 1988 713/181; 380/262; 714/798
4850017
Controlled use of cryptographic keys via generating station established
control values 380/280 ; 380/281; 380/45; 380/47
4850019
Data randomization equipment 380/29 ; 380/33; 380/37; 380/46
4856063
No-overhead synchronization for cryptographic systems August 8, 1989 380/262-
Datotek
1990
4881264
Digital signature system and method based on a conventional encryption
function 713/177 ; 380/28; 713/180
4893339
Secure communication system January 9, 1990
4908861
Data authentication using modification detection codes based on a
public one way encryption function 713/187 ; 340/5.8; 380/29;
380/30; 726/2
4956863 Cryptographic method and
apparatus for public key exchange with authentication 380/30 ;
380/285; 380/44; 380/47; 713/169; 713/171
4995082
Method for identifying subscribers and for generating and verifying
electronic signatures in a data exchange system
713/169 ; 380/30; 380/46; 705/67; 713/180
5003597
Method and apparatus for data encryption 380/37 ; 380/28; 380/29
5003599 In-band framing method and apparatus
5016274
On-line/off-line digital signing 705/66 ; 235/379; 235/380;
340/5.4; 380/29; 380/30; 713/180
5140634
Method and apparatus for authenticating accreditations and for
authenticating and signing messages 713/180 ; 235/382; 380/30;
705/67; 713/172
5146498
Remote key manipulations for over-the-air re-keying - based on
modifying the current stored key to make the new one
5214703
Device for the conversion of a digital block and use of same
380/37 ; 380/28; 380/42
5222136 Encrypted communication system 380/266; 380/29;
380/43; 380/284
5231668
Digital signature algorithm 380/28 ; 380/30
5237611 Encryption/decryption apparatus with non-accessible table
of keys
380/284; 380/30; 380/44; 380/45; 380/243; 713/181; 713/194
5276737
Fair cryptosystems and methods of use
380/30 ; 380/286
5278907Analog
scrambling with continuous synchronization - Audio
Samples -
5299262
Method for exponentiating in cryptographic systems
380/28 ; 380/30; 713/168; 713/174; 713/180
5301247 Method for ensuring secure communications 380/43;
380/46; 380/47; 380/277; 380/284
5305384
Apparatus, system and method for transmitting secure signals over
narrow spaced channels -300 Hz to 3200 Hz spaced 11.4 kHz
5311176
Method and apparatus for generating Walsh codes -
5363376
Method and apparatus for synchronizing timing among radio ports in
wireless communications systems
5428686
- Secure communication system having long-term keying variable
- NSA patent about mixing a key held in the scrambler with a key
sent over the
air.
5455861 Secure telecommunications - using encryption only over
part
of the comm path
5528693
Method and apparatus for voice encryption in a communications system
5787180
Method of connecting a scrambler or encryption device to a hand-held
portable cellular telephone - mike and spkr connections
5822430
System for encoding encryption/decryption information into IFF
challenges Oct 13, 1998 380/260; 342/45; 380/274; 380/277
5852803
Apparatus, System and Method for Recording and/or Retrieving
Audio Information Dec 22, 1998 704/270; 704/272 (talking label)
2000
6097812
Cryptographic system
Friedman Aug 1, 2000 380/26 ; 341/50; 341/90; 341/91; 380/287; 380/52;
380/56; 380/57; 380/59
6130946
Cryptographs
Friedman Oct 10, 2000 380/26 ; 341/50; 341/90; 341/91; 380/287; 380/52;
380/56; 380/57; 380/59
6175625
Control circuits for electric coding machines, Laurance F. Safford,
Donald W. Seiler (NSA), Jan 16, 2001 (filed: Dec 15, 1944) - SIGABA
SIGABA Wiki
380/26 ; 341/50; 341/90; 341/91;
380/287; 380/52; 380/56; 380/57; 380/59
Calls:
1540107
Apparatus for the Production of Cipher Documents especially for
Telegraphic Dispatch AG Damm
380/52 ; 400/474; 400/77
2116683
Coding and Decoding Machine WS Lemmon 380/55 ; 400/373; 400/474;
400/477 -
2116731
Coding and Decoding Machine AR Noll
380/55 ; 400/474;
400/478; 400/479; 400/77
2006, 380/277; 380/278; 380/279;
380/280; 713/193 - for use in missile mentiones KOI-18 & KYK-13
calls:
H1414
Nonvolatile memory system for storing a key word and sensing the
presence of an External Loader Device and Encryption Circuit, Gary S.
Borgen (Navy),
Feb 12 1991, 380/4; 380/9; 380/21;
380/49; 380/50; 395/425 - for use in missile
mentiones:
4392241 Digital Interface System, Dennis P. Hurst (Navy), Jul 5, 1983,
455/26; 455/27 - Red - Black com system
calls:
3262116
SATELLITE AND SPACE COMMUNICATIONS SYSTEMS Jul 1966
3879582
Data Loop Communication System, Apr 1975
3964056
System for transferring data between central units and controlled units
Jun 15, 1976
3970994
Communication switching system Jul 20, 1976
3993997
Communication system and method Nov 23, 1976
4034346
Interface for establishing communications between a data-processing
unit and a plurality of stations, Jul 5, 1977
4047162
Interface circuit for communicating between two data highways Sep 6,
1977
4140972
System for synchronizing synthesizers of communication systems, Feb 20,
1979
4184117
Communication security method and system, Jan 15, 1980
4320514
Spread spectrum FH-MFSK radio receiver, Mar 16, 1982
4563546 Method for preventing "compromising radiation", Ekkehard Glitz
(Licentia Patent-Verwaltungs-GmbH),
calls:
3077518
Apparatus for Camouflaging Communication Signals, Gustav GUANELLA
(Patelhold Switzerland) Feb 12 1963 - pulse manulipation keying
3133991
Method and Apparatus for Masking Communication Signals, GUANELLA May
1964 - voice signal is sampled and mixed with another signal resulting
in a noise like encrypted signal.
3634665
SYSTEM USE OF SELF-TESTING CHECKING CIRCUITS Jan 1972
4176247
Signal scrambler-unscrambler for binary coded transmission system Nov
27, 1979
4177355
Array device for data scrambling Dec 4, 1979
4225962
Mosaic printer Sep 30, 1980
4283602
Cryptographically secure communication system Aug 11, 1981
4404426
Cryptographic telegraphy programming system Sep 13, 1983
4447672
Device
for encrypting each input data bit by at least one keying bit decided
by a code pattern and a bit pattern of a predetermined number of
preceding encrypted bits, May 8, 1984
Model KGV-68 encryption circuit manufactured by Motorola
enciphering device described in U.S. Pat. No. 4563546
calls:
4097923
Remote
postage meter charging system using an advanced microcomputerized
postage meter Jun 27, 1978
4247908
Re-linked portable data terminal controller system Jan 27, 1981
4376299
Data
center for remote postage meter recharging system having physically
secure encrypting apparatus and employing encrypted seed number
signals, Mar 8, 1983
4392241
Digital interface system, Jul 5, 1983
4424573
System
for entering a postage meter serial number into a nonvolatile memory
from an external channel after assembly of the meter Jan 3, 1984
4470127
Data terminal with error checking file transfer mode, Sep 4, 1984
4563546
Method for preventing "compromising radiation" Jan 7, 1986
4654860
Spacecraft telemetry regenerator, Mar 31, 1987
4800590
Computer key and computer lock system, Jan 24, 1989
5046006
Mutual missile control system, Sep 3, 1991
Crypto microprocessor that executes enciphered programs Aug 14, 1984 -
178/220.8; 178/220.9; 200/610.8; 364/200
A microprocessor for executing computer
programs which are stored in cipher to prevent software piracy.
5458041
Air defense destruction missile weapon system Oct 17, 1995
5481610
Digital radio transceiver with encrypted key storage Jan 2, 1996
Ericsson Inc.
5513261
Key management scheme for use with electronic cards Apr 30, 1996
5654698
Missile telemetry data interface circuit Aug 5, 1997 - PCM data stream
-> TTL mixed with sync
|
PIC 16F84
H1414
Nonvolatile memory system for storing a key word and sensing the
presence of an External Loader Device and Encryption Circuit, Gary S.
Borgen (Navy),
Feb 12 1991, 380/4; 380/9; 380/21;
380/49; 380/50; 395/425 - for use in missile
6859537
Non-volatile memory for use with an encryption device Feb 22, 2005 -
mentiones KOI-18
same as 6968061
6968061
Method which uses a non-volatile memory to store a crypto key and a
check word for an encryption device Nov 22, 2005
A method using a Non-Volatile
Memory
circuit which operates as an
interface between a key loader and an encryption device in a missile's
telemetry system. The method includes a step for storing a crypto key
and an associated check word and a backup crypto key and check word in
the EEPROM of a microcontroller, and a step for indicating the status
of a load of the crypto key in the microcontroller as well as a step
for indicating the status of an erase of the crypto key from the
microcontroller. The method also includes a step for turning off the
missile's transmitter when a key load occurs to prevents transmission
of the crypto key and its corresponding check word. The method further
includes a step for erasing the crypto key and its associated check
word from an EEPROM within the microcontroller upon a missile launch.
mentiones KOI-18
Might be a description of the PPS-SM used in early GPS receivers like
the Trimpack and PLGR
same as 6968061
|
called by:
7321910
Microprocessor apparatus and method for performing block cipher
cryptographic functions Jan 22, 2008
Prior Art includes the AN/CYZ-10 (Fig
1).
calls:
4281216
Key management for encryption/decryption systems Jul 28, 1981 Motorola
FIPSP46 60+ patent pages of software flow diagrams.
5960085
Security badge for automated access control and secure data gathering
Sep 28, 1999
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