BR9904711A - Método eficiente de codificação de bloco - Google Patents
Método eficiente de codificação de blocoInfo
- Publication number
- BR9904711A BR9904711A BR9904711A BR9904711A BR9904711A BR 9904711 A BR9904711 A BR 9904711A BR 9904711 A BR9904711 A BR 9904711A BR 9904711 A BR9904711 A BR 9904711A BR 9904711 A BR9904711 A BR 9904711A
- Authority
- BR
- Brazil
- Prior art keywords
- present
- operations
- hashing
- functions
- instead
- 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
- H04L9/0643—Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
-
- 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
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
- H04L9/0625—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation with splitting of the data block into left and right halves, e.g. Feistel based algorithms, DES, FEAL, IDEA or KASUMI
Abstract
<B>MéTODO EFICIENTE DE CODIFICAçãO DE BLOCO<D> A presente invenção resolve as ineficiências mencionadas acima fornecendo um método de criptografia ou codificação que usa a mesma função pseudo-aleatória duas vezes em vez de funções pseudo-aleatórias diferentes. Além disso, a presente invenção usa funções de hashing altamente eficientes. As funções de hashing da presente invenção são funções de hashing quadradas que elevam ao quadrado uma soma de uma chave e uma cadeia de dados em vez de usar uma multiplicação. Como resultado, a operação de hashing somente exige (w² + w) / 2 operações em vez das w² operações exigidas pelas funções de hashing ineficientes usadas no estado da técnica. Além disso, a presente invenção substitui as operações passadas por uma operação OU exclusiva do estado da técnica por operações de soma "n" modular.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17517998A | 1998-10-20 | 1998-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR9904711A true BR9904711A (pt) | 2000-10-03 |
Family
ID=22639275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR9904711A BR9904711A (pt) | 1998-10-20 | 1999-10-13 | Método eficiente de codificação de bloco |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0996250A3 (pt) |
| JP (2) | JP2000122534A (pt) |
| KR (1) | KR100583495B1 (pt) |
| CN (1) | CN1251444A (pt) |
| AU (1) | AU5361099A (pt) |
| BR (1) | BR9904711A (pt) |
| CA (1) | CA2282051A1 (pt) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7577250B2 (en) | 2004-08-12 | 2009-08-18 | Cmla, Llc | Key derivation functions to enhance security |
| KR20030059500A (ko) * | 2001-12-29 | 2003-07-10 | 한국전자통신연구원 | 에스.피.엔(ｓｐｎ) 구조를 가지는 블록 암호를 이용한유사난수 발생기 및 방법 |
| KR100924773B1 (ko) * | 2002-09-16 | 2009-11-03 | 삼성전자주식회사 | 메타데이터 암호화 및 복호화 방법과 암호화된 메타데이터관리 방법 및 그 시스템 |
| FR2847402B1 (fr) * | 2002-11-15 | 2005-02-18 | Gemplus Card Int | Procede de division entiere securise contre les attaques a canaux caches |
| EP1582023A4 (en) * | 2003-03-27 | 2007-02-28 | Nds Ltd | ENHANCED ENCRYPTION SYSTEM IN CFM MODE |
| NZ603822A (en) * | 2004-08-12 | 2013-07-26 | Cmla Llc | Permutation data transform to enhance security |
| EP1877948B1 (en) | 2005-05-02 | 2013-07-03 | NDS Limited | Native scrambling system |
| US8121284B2 (en) * | 2006-03-14 | 2012-02-21 | Nec Corporation | Information processing system, information processing method, and information processing program |
| WO2008053650A1 (en) * | 2006-10-30 | 2008-05-08 | Nec Corporation | Common key block encrypting device, its method, its program, and recording medium |
| JP5291628B2 (ja) * | 2006-11-28 | 2013-09-18 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | シードが与えられる任意数を生成する方法 |
| CN101753304B (zh) * | 2008-12-17 | 2012-07-04 | 中国科学院自动化研究所 | 一种生物特征和密钥绑定的方法 |
| KR101437033B1 (ko) * | 2012-06-21 | 2014-11-03 | 기초과학연구원 | 저성능 디바이스의 인증 방법 |
| US10887080B2 (en) | 2017-03-16 | 2021-01-05 | King Fahd University Of Petroleum And Minerals | Double-hashing operation mode for encryption |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4625076A (en) * | 1984-03-19 | 1986-11-25 | Nippon Telegraph & Telephone Public Corporation | Signed document transmission system |
-
1999
- 1999-08-30 CA CA002282051A patent/CA2282051A1/en not_active Abandoned
- 1999-10-12 EP EP99308041A patent/EP0996250A3/en not_active Withdrawn
- 1999-10-12 AU AU53610/99A patent/AU5361099A/en not_active Abandoned
- 1999-10-13 BR BR9904711A patent/BR9904711A/pt not_active Application Discontinuation
- 1999-10-18 JP JP11295776A patent/JP2000122534A/ja active Pending
- 1999-10-19 CN CN 99123126 patent/CN1251444A/zh active Pending
- 1999-10-20 KR KR19990045550A patent/KR100583495B1/ko not_active IP Right Cessation
-
2004
- 2004-07-27 JP JP2004218586A patent/JP2004361969A/ja not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000035057A (ko) | 2000-06-26 |
| AU5361099A (en) | 2000-05-04 |
| KR100583495B1 (ko) | 2006-05-24 |
| JP2004361969A (ja) | 2004-12-24 |
| EP0996250A3 (en) | 2002-05-22 |
| CN1251444A (zh) | 2000-04-26 |
| EP0996250A2 (en) | 2000-04-26 |
| JP2000122534A (ja) | 2000-04-28 |
| CA2282051A1 (en) | 2000-04-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FA10 | Dismissal: dismissal - article 33 of industrial property law | ||
| B11Y | Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired |