IT939641B - Perfezionamento nei dispositivi per la generazione di codici di cifratura per sistemi crittografici - Google Patents
Perfezionamento nei dispositivi per la generazione di codici di cifratura per sistemi crittograficiInfo
- Publication number
- IT939641B IT939641B IT53620/71A IT5362071A IT939641B IT 939641 B IT939641 B IT 939641B IT 53620/71 A IT53620/71 A IT 53620/71A IT 5362071 A IT5362071 A IT 5362071A IT 939641 B IT939641 B IT 939641B
- Authority
- IT
- Italy
- Prior art keywords
- improvement
- generation
- devices
- cryptographic systems
- encryption codes
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
- H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
- H04L9/0662—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator
- H04L9/0668—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator producing a non-linear pseudorandom sequence
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Storage Device Security (AREA)
- Communication Control (AREA)
- Stereo-Broadcasting Methods (AREA)
- Synchronizing For Television (AREA)
- Electrophonic Musical Instruments (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13432071A | 1971-04-15 | 1971-04-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
IT939641B true IT939641B (it) | 1973-02-10 |
Family
ID=22462819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT53620/71A IT939641B (it) | 1971-04-15 | 1971-10-21 | Perfezionamento nei dispositivi per la generazione di codici di cifratura per sistemi crittografici |
Country Status (9)
Country | Link |
---|---|
US (1) | US3781473A (it) |
CA (1) | CA950360A (it) |
CH (1) | CH572688A5 (it) |
DE (1) | DE2154019C3 (it) |
FR (1) | FR2133395A5 (it) |
GB (1) | GB1361850A (it) |
IT (1) | IT939641B (it) |
NL (1) | NL7115278A (it) |
NO (1) | NO142797C (it) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004089A (en) * | 1975-02-28 | 1977-01-18 | Ncr Corporation | Programmable cryptic device for enciphering and deciphering data |
US4166922A (en) * | 1975-04-14 | 1979-09-04 | Datotek, Inc. | Multi-mode digital enciphering system with repeated priming sequences |
US4133974A (en) * | 1976-11-05 | 1979-01-09 | Datotek, Inc. | System for locally enciphering prime data |
DE2706421C2 (de) * | 1977-02-16 | 1979-03-15 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zum Einstellen von Schlüsseltextgeneratoren in Chiffriergeräten |
US4202051A (en) * | 1977-10-03 | 1980-05-06 | Wisconsin Alumni Research Foundation | Digital data enciphering and deciphering circuit and method |
FR2477344B1 (fr) * | 1980-03-03 | 1986-09-19 | Bull Sa | Procede et systeme de transmission d'informations confidentielles |
US5428686A (en) * | 1981-09-28 | 1995-06-27 | The United States Of America As Represented By The Direrctor Of The National Security Agency | Secure communication system having long-term keying variable |
WO1984000457A1 (en) * | 1982-07-15 | 1984-02-02 | Light Signatures Inc | Private communication system |
US4688257A (en) * | 1984-07-17 | 1987-08-18 | General Electric Company | Secure wireless communication system utilizing locally synchronized noise signals |
US4802217A (en) * | 1985-06-07 | 1989-01-31 | Siemens Corporate Research & Support, Inc. | Method and apparatus for securing access to a computer facility |
EP0205095B1 (de) | 1985-06-07 | 1993-02-03 | Siemens Aktiengesellschaft | Verfahren und Anordnung zur Sicherung des Zugriffs zu einer Rechenanlage |
US4860353A (en) * | 1988-05-17 | 1989-08-22 | General Instrument Corporation | Dynamic feedback arrangement scrambling technique keystream generator |
SE470242B (sv) * | 1992-05-12 | 1993-12-13 | Ericsson Telefon Ab L M | Anordning för generering av slumptal |
US5297207A (en) * | 1993-05-24 | 1994-03-22 | Degele Steven T | Machine generation of cryptographic keys by non-linear processes similar to processes normally associated with encryption of data |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL225293A (it) * | 1957-02-26 | |||
DE1237366B (de) * | 1961-08-18 | 1967-03-23 | Gretag Ag | Verfahren zur Ver- und Entschluesselung von impulsfoermig uebertragenen Nachrichten |
US3522374A (en) * | 1966-06-17 | 1970-07-28 | Int Standard Electric Corp | Ciphering unit |
-
1971
- 1971-04-15 US US00134320A patent/US3781473A/en not_active Expired - Lifetime
- 1971-10-18 FR FR7137279A patent/FR2133395A5/fr not_active Expired
- 1971-10-20 GB GB4872371A patent/GB1361850A/en not_active Expired
- 1971-10-21 IT IT53620/71A patent/IT939641B/it active
- 1971-10-29 DE DE2154019A patent/DE2154019C3/de not_active Expired
- 1971-11-05 NL NL7115278A patent/NL7115278A/xx not_active Application Discontinuation
-
1972
- 1972-03-21 NO NO914/72A patent/NO142797C/no unknown
- 1972-03-29 CA CA138,431,A patent/CA950360A/en not_active Expired
- 1972-03-30 CH CH474472A patent/CH572688A5/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CH572688A5 (it) | 1976-02-13 |
DE2154019A1 (de) | 1972-11-09 |
NL7115278A (it) | 1972-10-17 |
DE2154019C3 (de) | 1981-12-10 |
NO142797C (no) | 1980-10-15 |
NO142797B (no) | 1980-07-07 |
CA950360A (en) | 1974-07-02 |
DE2154019B2 (de) | 1981-02-26 |
FR2133395A5 (it) | 1972-11-24 |
GB1361850A (en) | 1974-07-30 |
US3781473A (en) | 1973-12-25 |
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