| |
Pat.
No. |
Title |
| 801. |
4,736,420
Video scrambling by segmenting video information lines Apr. 5, 1988 |
| 802. |
4,736,419
Electronic lock system |
| 803. |
4,733,345
Computer-telephone security device |
| 804. |
4,731,843
Method and device of increasing the execution speed of cipher feedback mode
of the DES by an arbitrary multiplier |
| 805. |
4,731,842
Security module for an electronic funds transfer system |
| 806. |
4,731,840
Method for encryption and transmission of digital keying data |
| 807. |
4,720,861
Digital speech coding circuit |
| 808. |
4,709,266
Satellite scrambling communication network using geographically separated
uplinks |
| 809. |
4,707,592
Personal universal identity card system for failsafe interactive financial
transactions |
| 810. |
4,703,503
Cryptographic system using pseudocomplements of vector Boolean algebra |
| 811. |
4,694,492
Computer communications security control system |
| 812. |
4,694,491
Cryptographic system using interchangeable key blocks and selectable key
fragments |
| 813. |
4,691,355
Interactive security control system for computer communications and the
like |
| 814. |
4,689,606
Data encoding/decoding circuit |
| 815. |
4,688,250
Apparatus and method for effecting a key change via a cryptographically protected
link |
| 816. |
4,688,247
Pay TV scrambling by audio encryption |
| 817. |
4,672,182
Memory card |
| 818. |
4,668,103
Polygraphic encryption-decryption communications system |
| 819. |
4,667,301
Generator for pseudo-random numbers |
| 820. |
4,660,221
System for printing encrypted messages with bar-code representation |
| 821. |
4,658,094
encryption apparatus and methods for raising a large unsigned integer to
a large unsigned integer power modulo a large unsigned integer |
| 822. |
4,649,233
Method for establishing user authenication with composite session keys among
cryptographically communicating nodes |
| 823. |
4,642,688
Method and apparatus for creating encrypted and decrypted television
signals |
| 824. |
4,641,347
System for printing encrypted messages with a character generator and bar-code
representation |
| 825. |
4,641,346
System for the printing and reading of encrypted messages |
| 826. |
4,637,051
System having a character generator for printing encrypted messages |
| 827. |
4,636,854
Transmission system |
| 828. |
4,636,851
Signal coding for secure transmission |
| 829. |
4,635,223
Fail safe protection circuitry for a commerical microprocessor in encryption
equipment |
| 830. |
4,634,808
Descrambler subscriber key production system utilizing key seeds stored in
descrambler |
| 831. |
4,634,807
Software protection device |
| 832. |
4,633,388
On-chip microprocessor instruction decoder having hardware for selectively
bypassing on-chip circuitry used to decipher encrypted instruction codes |
| 833. |
4,633,037
Generation of identification keys |
| 834. |
4,633,036
Method and apparatus for use in public-key data encryption system |
| 835. |
4,629,874
Prepayment metering system |
| 836. |
4,629,872
Method and apparatus for verifying personal identification numbers and checking
stored number series in identification media |
| 837. |
4,628,358
Television signal encryption system with protected audio |
| 838. |
4,613,901
Signal encryption and distribution system for controlling scrambling and
selective remote descrambling of television signals |
| 839. |
4,608,486
Data entry system |
| 840. |
4,608,455
Processing of encrypted voice signals |
| 841. |
4,603,381
Use of implant process for programming ROM type processor for encryption |
| 842. |
4,598,318
Video encryption system |
| 843. |
4,598,170
Secure microprocessor |
| 844. |
4,596,898
Method and apparatus for protecting stored and transmitted data from compromise
or interception |
| 845. |
4,593,353
Software protection method and apparatus |
| 846. |
4,591,660
Common control audio decryptor |
| 847. |
4,590,470
User authentication system employing encryption functions |
| 848. |
4,588,991
File access security method and means |
| 849. |
4,578,531
encryption system key distribution method and apparatus |
| 850. |
4,578,530
End-to-end encryption system and method of operation |
| 851. |
4,573,205
Technique for secure communications on FM radio channels |
| 852. |
4,570,156
Self-contained secured work station |
| 853. |
4,567,600
Method and apparatus for maintaining the privacy of digital messages conveyed
by public transmission |
| 854. |
4,563,546
Method for preventing "compromising radiation" |
| 855. |
4,562,305
Software cryptographic apparatus and method |
| 856. |
4,558,176
Computer systems to inhibit unauthorized copying, unauthorized usage, and
automated cracking of protected software |
| 857. |
4,555,591
Integrated circuit devices for secure data encryption |
| 858. |
4,550,222
Process for interception-protected frequency band compressed transmission
of speech signals |
| 859. |
4,549,308
Secure mobile radio telephony |
| 860. |
4,543,646
Chip topography for MOS Data encryption Standard circuit |
| 861. |
4,535,355
Method and apparatus for scrambling and unscrambling data streams using
encryption and decryption |
| 862. |
4,532,416
Transaction terminal with simplified data entry |
| 863. |
4,531,021
Two level encripting of RF signals |
| 864. |
4,531,020
Multi-layer encryption system for the broadcast of encrypted information |
| 865. |
4,525,844
Method for interchanging n partial bands |
| 866. |
4,525,599
Software protection methods and apparatus |
| 867. |
4,520,232
Polygraphic encryption-decryption system |
| 868. |
4,514,761
Data encryption technique for subscription television system |
| 869. |
4,500,750
Cryptographic application for interbank verification |
| 870. |
4,493,028
Dual mode I/O |
| 871. |
4,484,027
Security system for SSTV encryption |
| 872. |
4,484,025
System for enciphering and deciphering data |
| 873. |
4,471,164
Stream cipher operation using public key cryptosystem |
| 874. |
4,465,901
Crypto microprocessor that executes enciphered programs |
| 875. |
4,453,074
Protection system for intelligent cards |
| 876. |
4,447,672
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 |
| 877. |
4,440,976
Automatic selection of decryption key for multiple-key encryption systems |
| 878. |
4,438,824
Apparatus and method for cryptographic identity verification |
| 879. |
4,434,322
Coded data transmission system |
| 880. |
4,431,865
Digital signal enciphering and deciphering apparatus and system |
| 881. |
4,423,287
End-to-end encryption system and method of operation |
| 882. |
4,418,425
encryption using destination addresses in a TDMA satellite communications
network |
| 883. |
4,411,017
Secure mobile telephone system |
| 884. |
4,408,093
Cryptographic encoder-decoder |
| 885. |
4,401,854
Simultaneous transmission of an analog message signal and a digital data
signal |
| 886. |
4,396,802
Aswixs remote speaker and handset set |
| 887. |
4,393,269
Method and apparatus incorporating a one-way sequence for transaction and
identity verification |
| 888. |
4,392,241
Digital interface system |
| 889. |
4,390,898
Scrambling and unscrambling video signals in a pay TV system |
| 890. |
4,386,416
Data compression, encryption, and in-line transmission system |
| 891. |
4,386,233
Crytographic key notarization methods and apparatus |
| 892. |
D268,931
Keyloader module for encryption systems or similar article |
| 893. |
4,375,579
Database encryption and decryption circuit and method using subkeys |
| 894. |
4,369,332
Key variable generator for an encryption/decryption device |
| 895. |
4,365,110
Multiple-destinational cryptosystem for broadcast networks |
| 896. |
4,352,952
Data security module |
| 897. |
4,351,982
RSA Public-key data encryption system having large random prime number generating
microprocessor or the like |
| 898. |
4,341,925
Random digital encryption secure communication system |
| 899. |
4,337,483
Text video-transmission system provided with means for controlling access
to the information |
| 900. |
D264,843
Multiple module serial link encryption unit or similar article |
| 901. |
4,323,921
System for transmitting information provided with means for controlling access
to the information transmitted |
| 902. |
4,322,577
Cryptosystem |
| 903. |
4,322,576
Message format for secure communication over data links |
| 904. |
D263,395
Multiple module serial link encryption unit or similar article |
| 905. |
4,319,079
Crypto microprocessor using block cipher |
| 906. |
4,315,101
Method and apparatus for securing data transmissions |
| 907. |
4,313,031
Encipher-decipher device having semi-automatic generation of the code key
during data entry |
| 908. |
4,310,720
Computer accessing system |
| 909. |
4,306,111
Simple and effective public-key cryptosystem |
| 910. |
4,302,810
Method and apparatus for secure message transmission for use in electronic
funds transfer systems |
| 911. |
4,283,599
Method and apparatus for securing data transmissions |
| 912. |
4,281,216
Key management for encryption/decryption systems |
| 913. |
4,281,215
Method and apparatus for securing data transmissions |
| 914. |
4,278,840
Dynamic frequency and time voice encryption system and method |
| 915. |
4,278,837
Crypto microprocessor for executing enciphered programs |
| 916. |
4,274,085
Flexible mode DES system |
| 917. |
4,268,715
Method and apparatus for securing data transmissions |
| 918. |
4,264,782
Method and apparatus for transaction and identity verification |
| 919. |
4,262,358
DES Parity check system |
| 920. |
4,262,329
Security system for data processing |
| 921. |
4,253,158
System for securing postage printing transactions |
| 922. |
4,249,180
Past dependent microcomputer cipher apparatus |
| 923. |
4,232,194
Voice encryption system |
| 924. |
4,214,230
Personal identification system |
| 925. |
4,208,739
Integrated encryption and channel coding technique |
| 926. |
4,186,871
Transaction execution system with secure encryption key storage and
communications |
| 927. |
4,172,213
Byte stream selective encryption/decryption device |
| 928. |
4,165,444
Apparatus for electronic encypherment of digital data |
| 929. |
4,162,483
Bilateral master station-plural satellite station signalling apparatus |
| 930. |
4,160,120
Link encryption device |
| 931. |
4,107,458
Cipher computer and cryptographic system |
| 932. |
4,091,246
encryption device interlock |
| 933. |
3,956,615
Transaction execution system with secure data storage and communications
May 11, 1976 |