BR0318492A - rede dependente de chave combinatória para criptografia/decifração de dados digitais de entrada, bloco para ser usado para funções criptográficas controladas por chave secreta, método para criptografia/decifração de dados digitais de entrada, dispositivo de processamento de dados, e, dispositivo de multimìdia para armazenar e reproduzir dados digitais - Google Patents

rede dependente de chave combinatória para criptografia/decifração de dados digitais de entrada, bloco para ser usado para funções criptográficas controladas por chave secreta, método para criptografia/decifração de dados digitais de entrada, dispositivo de processamento de dados, e, dispositivo de multimìdia para armazenar e reproduzir dados digitais

Info

Publication number
BR0318492A
BR0318492A BRPI0318492-7A BR0318492A BR0318492A BR 0318492 A BR0318492 A BR 0318492A BR 0318492 A BR0318492 A BR 0318492A BR 0318492 A BR0318492 A BR 0318492A
Authority
BR
Brazil
Prior art keywords
bits
decryption
encryption
input data
digital input
Prior art date
Application number
BRPI0318492-7A
Other languages
English (en)
Inventor
Jovan Golic
Original Assignee
Telecom Italia Spa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telecom Italia Spa filed Critical Telecom Italia Spa
Publication of BR0318492A publication Critical patent/BR0318492A/pt

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
    • H04L9/0618—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
    • 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
    • H04L9/0631—Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
    • 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
    • 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
    • H04L2209/12—Details relating to cryptographic hardware or logic circuitry
    • H04L2209/125—Parallelization or pipelining, e.g. for accelerating processing of cryptographic operations
    • 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
    • H04L2209/24—Key scheduling, i.e. generating round keys or sub-keys for block encryption

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Storage Device Security (AREA)

Abstract

"REDE DEPENDENTE DE CHAVE COMBINATóRIA PARA CRIPTOGRAFIA/DECIFRAçãO DE DADOS DIGITAIS DE ENTRADA, BLOCO PARA SER USADO PARA FUNçõES CRIPTOGRáFICAS CONTROLADAS POR CHAVE SECRETA, MéTODO PARA CRIPTOGRAFIA/DECIFRAçãO DE DADOS DIGITAIS DE ENTRADA, DISPOSITIVO DE PROCESSAMENTO DE DADOS, E, DISPOSITIVO DE MULTIMìDIA PARA ARMAZENAR E REPRODUZIR DADOS DIGITAIS". Uma rede dependente de chave combinatória (46), adequada para a criptografia/decifração de dados em barramentos e em memórias de dispositivos de processamento de dados, inclui várias camadas, onde cada camada é composta de vários blocos de construção elementares (2) operando em tamanhos de bloco muito pequenos. Um bloco de construção genérico (2) atua em um pequeno número de bits de dados de entrada, que são divididos em dois grupos de m e n bits, respectivamente. Os m bits de entrada, que são passados à saída intactos, são usados para selecionar k fora de 2¬ m¬k bits de chave por um circuito de multiplexador; os k bits são então usados para selecionar uma transformação reversível de (nxn) bits (R~ k~) atuando nos n bits de entrada restantes para produzir os n bits de saída correspondentes. O número total dos bits de chave no bloco de construção é assim 2¬ m¬k, que pode facilmente ser feito maior que m+n. Um bloco de construção inverso é o mesmo, exceto que as transformações reversíveis R~ k~ são substituídas por seus inversos R~ k~¬ -1¬.
BRPI0318492-7A 2003-09-05 2003-09-05 rede dependente de chave combinatória para criptografia/decifração de dados digitais de entrada, bloco para ser usado para funções criptográficas controladas por chave secreta, método para criptografia/decifração de dados digitais de entrada, dispositivo de processamento de dados, e, dispositivo de multimìdia para armazenar e reproduzir dados digitais BR0318492A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2003/000532 WO2005025124A1 (en) 2003-09-05 2003-09-05 Secret-key-controlled reversible circuit and corresponding method of data processing

Publications (1)

Publication Number Publication Date
BR0318492A true BR0318492A (pt) 2006-09-12

Family

ID=34259990

Family Applications (2)

Application Number Title Priority Date Filing Date
BRPI0318492-7A BR0318492A (pt) 2003-09-05 2003-09-05 rede dependente de chave combinatória para criptografia/decifração de dados digitais de entrada, bloco para ser usado para funções criptográficas controladas por chave secreta, método para criptografia/decifração de dados digitais de entrada, dispositivo de processamento de dados, e, dispositivo de multimìdia para armazenar e reproduzir dados digitais
BRPI0318492 BRPI0318492B1 (pt) 2003-09-05 2003-09-05 rede dependente de chave combinatória e método para criptografia/decifração de dados digitais de entrada

Family Applications After (1)

Application Number Title Priority Date Filing Date
BRPI0318492 BRPI0318492B1 (pt) 2003-09-05 2003-09-05 rede dependente de chave combinatória e método para criptografia/decifração de dados digitais de entrada

Country Status (6)

Country Link
US (1) US7913083B2 (pt)
EP (1) EP1661295B1 (pt)
CN (1) CN1826753B (pt)
AU (1) AU2003274687A1 (pt)
BR (2) BR0318492A (pt)
WO (1) WO2005025124A1 (pt)

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EP2293487A1 (en) * 2009-09-08 2011-03-09 Thomson Licensing A method of diversification of a round function of an encryption algorithm
JP5488608B2 (ja) * 2009-10-27 2014-05-14 日本電気株式会社 ブロック暗号装置、ブロック暗号化方法およびプログラム
JP5682525B2 (ja) 2011-03-28 2015-03-11 ソニー株式会社 暗号処理装置、および暗号処理方法、並びにプログラム
EP2602952A1 (en) * 2011-12-07 2013-06-12 Gemalto SA Cryptographic method for protecting a key hardware register against fault attacks
JP5612007B2 (ja) * 2012-03-15 2014-10-22 株式会社東芝 暗号化鍵生成装置
JP2015191106A (ja) * 2014-03-28 2015-11-02 ソニー株式会社 暗号処理装置、および暗号処理方法、並びにプログラム
US9264229B1 (en) 2014-07-24 2016-02-16 Elliptic Technologies Inc. System and method for generating random key stream cipher texts
WO2016012825A1 (en) * 2014-07-24 2016-01-28 Elliptic Technologies Inc. System and method for generating random key stream cipher texts
US9654111B1 (en) * 2014-11-12 2017-05-16 Maxim Integrated Products, Inc. Systems and methods for protecting data using reconfigurable logic paths
US10797722B2 (en) * 2016-06-10 2020-10-06 The Boeing Company System and method for providing hardware based fast and secure expansion and compression functions
US10992468B2 (en) * 2018-03-19 2021-04-27 Arm Limited Key schedule determination

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Also Published As

Publication number Publication date
CN1826753B (zh) 2010-12-08
BRPI0318492B1 (pt) 2019-12-10
AU2003274687A1 (en) 2005-03-29
EP1661295A1 (en) 2006-05-31
US20060236102A1 (en) 2006-10-19
CN1826753A (zh) 2006-08-30
WO2005025124A1 (en) 2005-03-17
US7913083B2 (en) 2011-03-22
EP1661295B1 (en) 2013-03-27

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]
B12B Appeal against refusal [chapter 12.2 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 10/12/2019, OBSERVADAS AS CONDICOES LEGAIS. (CO) 10 (DEZ) ANOS CONTADOS A PARTIR DE 10/12/2019, OBSERVADAS AS CONDICOES LEGAIS

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE A 19A ANUIDADE.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2686 DE 28-06-2022 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.