BR9806124A - Métodos e aparelho para cmea otimizado empregando transformações otimizadas - Google Patents
Métodos e aparelho para cmea otimizado empregando transformações otimizadasInfo
- Publication number
- BR9806124A BR9806124A BR9806124-0A BR9806124A BR9806124A BR 9806124 A BR9806124 A BR 9806124A BR 9806124 A BR9806124 A BR 9806124A BR 9806124 A BR9806124 A BR 9806124A
- Authority
- BR
- Brazil
- Prior art keywords
- message
- optimized
- cmea
- produce
- tbox function
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/03—Protecting confidentiality, e.g. by encryption
- H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/08—Randomization, e.g. dummy operations or using noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/80—Wireless
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
MéTODOS E APARELHO PARA CMEA OTIMIZADO EMPREGANDO TRANSFORMAçõES OTIMIZADAS. Método de criptoprocessar CMEA otimizado de emissão para cada mensagem em uma chamada, para uso em um sistema de codificação CMEA empregado em um sistema de telefone sem fio compreendendo as etapas de introduzir uma mensagem não processada; criar um ou mais offsets secretos; realizar uma transformação na mensagem não processada para produzir uma mensagem transformada; realizar uma iteração de um processo CMEA na mensagem transformada para produzir uma mensagem de texto cifrado intermediária, a iteração do processo CMEA empregando um função tbox otimizada utilizando uma consulta involuntária, a função tbox recebendo entradas, as entradas para a função tbox otimizada sendo submetidas a uma permuta utilizando um ou mais dos offsets secretos para produzir um resultado de permuta; e realizar uma transformação inversa da mensagem de texto cifrado intermediária para produzir uma mensagem processada final. Aparelho telefónico sem fio para transmitir mensagens de forma segura, compreendendo: um transceptor; uma interface de entrada/saída; um gerador de código para gerar um ou mais códigos a serem usados durante uma chamada; e um criptoprocessador para receber a partir da interface de entrada/saída uma mensagem a ser codificada ou decodificada junto com identificação da mensagem como texto puro a ser codificado ou texto cifrado a ser decodificado e processando a mensagem como utilizando um processo CMEA otimizado de emissão incluindo uma transformação, uma iteração CMEA incluindo uma função tbox otimizada com entradas permutadas por um ou mais offsets secretos, a função tbox otimizada empregando uma tabela de consulta involuntária, e uma transformação inversa, o processador de codificação/decodificação sendo adicionalmente operativo para retornar a mensagem codificada ou decodificada para a interface de entrada/saída para encaminhamento adicional.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5401897P | 1997-07-29 | 1997-07-29 | |
PCT/US1998/015883 WO1999007103A1 (en) | 1997-07-29 | 1998-07-29 | Methods and apparatus for enhanced cmea employing enhanced transformations |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9806124A true BR9806124A (pt) | 1999-08-31 |
Family
ID=21988232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9806124-0A BR9806124A (pt) | 1997-07-29 | 1998-07-29 | Métodos e aparelho para cmea otimizado empregando transformações otimizadas |
Country Status (9)
Country | Link |
---|---|
US (1) | US6377687B1 (pt) |
EP (1) | EP0928526B1 (pt) |
JP (2) | JP3466204B2 (pt) |
KR (1) | KR100573180B1 (pt) |
CN (1) | CN1236516A (pt) |
BR (1) | BR9806124A (pt) |
CA (1) | CA2266665A1 (pt) |
DE (1) | DE69830646T2 (pt) |
WO (1) | WO1999007103A1 (pt) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6075859A (en) * | 1997-03-11 | 2000-06-13 | Qualcomm Incorporated | Method and apparatus for encrypting data in a wireless communication system |
JP2001359165A (ja) * | 2000-06-15 | 2001-12-26 | Mitsubishi Electric Corp | モバイル通信システム |
DE10103609A1 (de) * | 2001-01-28 | 2002-08-14 | Audioton Kabelwerk Gmbh | Freisprecheinrichtung für den Betrieb von Mobiltelefonen in Kraftfahrzeugen |
DE10103608A1 (de) * | 2001-01-28 | 2002-08-14 | Audioton Kabelwerk Gmbh | Freisprecheinrichtung für den Betrieb von Mobiltelefonen in Kraftfahrzeugen |
ATE509442T1 (de) * | 2003-12-11 | 2011-05-15 | Irdeto Bv | Blockchiffriersystem unter verwendung von permutationen zum verbergen der kernchiffrierfunktion jeder verschlüsselungsrunde |
US20050193197A1 (en) * | 2004-02-26 | 2005-09-01 | Sarvar Patel | Method of generating a cryptosync |
EP1926278B1 (en) * | 2006-11-22 | 2009-04-01 | Research In Motion Limited | System and method for secure record protocol using shared knowledge of mobile user credentials |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1522775A (en) * | 1922-04-14 | 1925-01-13 | William F Friedman | Secret-signaling apparatus for automatically enciphering and deciphering messages |
US1516180A (en) * | 1922-06-05 | 1924-11-18 | William F Friedman | Secret signaling system employing apparatus for automatically enciphering and deciphering messages |
US5159634A (en) * | 1991-09-13 | 1992-10-27 | At&T Bell Laboratories | Cryptosystem for cellular telephony |
US5410599A (en) * | 1992-05-15 | 1995-04-25 | Tecsec, Incorporated | Voice and data encryption device |
GB9211648D0 (en) * | 1992-06-02 | 1992-07-15 | Racal Datacom Ltd | Data communication system |
US5594797A (en) * | 1995-02-22 | 1997-01-14 | Nokia Mobile Phones | Variable security level encryption |
-
1998
- 1998-07-29 DE DE69830646T patent/DE69830646T2/de not_active Expired - Lifetime
- 1998-07-29 KR KR1019997002699A patent/KR100573180B1/ko not_active IP Right Cessation
- 1998-07-29 JP JP51123599A patent/JP3466204B2/ja not_active Expired - Fee Related
- 1998-07-29 BR BR9806124-0A patent/BR9806124A/pt unknown
- 1998-07-29 EP EP98938164A patent/EP0928526B1/en not_active Expired - Lifetime
- 1998-07-29 CA CA002266665A patent/CA2266665A1/en not_active Abandoned
- 1998-07-29 US US09/124,300 patent/US6377687B1/en not_active Expired - Lifetime
- 1998-07-29 CN CN98801064A patent/CN1236516A/zh active Pending
- 1998-07-29 WO PCT/US1998/015883 patent/WO1999007103A1/en active IP Right Grant
-
2003
- 2003-02-13 JP JP2003035739A patent/JP2003263109A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2000508441A (ja) | 2000-07-04 |
JP3466204B2 (ja) | 2003-11-10 |
JP2003263109A (ja) | 2003-09-19 |
US6377687B1 (en) | 2002-04-23 |
CN1236516A (zh) | 1999-11-24 |
CA2266665A1 (en) | 1999-02-11 |
DE69830646T2 (de) | 2006-05-11 |
DE69830646D1 (de) | 2005-07-28 |
KR100573180B1 (ko) | 2006-04-24 |
EP0928526B1 (en) | 2005-06-22 |
WO1999007103A1 (en) | 1999-02-11 |
EP0928526A1 (en) | 1999-07-14 |
KR20000068663A (ko) | 2000-11-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B08F | Application fees: application dismissed [chapter 8.6 patent gazette] |