CA2205127C - Methode et appareil servant a effectuer simultanement une compression et un chiffrement de donnees - Google Patents

Methode et appareil servant a effectuer simultanement une compression et un chiffrement de donnees Download PDF

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Publication number
CA2205127C
CA2205127C CA 2205127 CA2205127A CA2205127C CA 2205127 C CA2205127 C CA 2205127C CA 2205127 CA2205127 CA 2205127 CA 2205127 A CA2205127 A CA 2205127A CA 2205127 C CA2205127 C CA 2205127C
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CA
Canada
Prior art keywords
input data
symbols
data
processor
random number
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CA 2205127
Other languages
English (en)
Other versions
CA2205127A1 (fr
Inventor
Abdulkader Omar Barbir
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Microsemi Semiconductor ULC
Original Assignee
Mitel Corp
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 Mitel Corp filed Critical Mitel Corp
Priority to CA 2205127 priority Critical patent/CA2205127C/fr
Priority to EP97650019A priority patent/EP0810737A3/fr
Publication of CA2205127A1 publication Critical patent/CA2205127A1/fr
Application granted granted Critical
Publication of CA2205127C publication Critical patent/CA2205127C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/005—Statistical coding, e.g. Huffman, run length coding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3084—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction using adaptive string matching, e.g. the Lempel-Ziv method
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory
    • 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
    • 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
    • H04L2209/30—Compression, e.g. Merkle-Damgard construction
    • 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
    • H04L2209/34—Encoding or coding, e.g. Huffman coding or error correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
CA 2205127 1996-05-30 1997-05-12 Methode et appareil servant a effectuer simultanement une compression et un chiffrement de donnees Expired - Fee Related CA2205127C (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA 2205127 CA2205127C (fr) 1997-05-12 1997-05-12 Methode et appareil servant a effectuer simultanement une compression et un chiffrement de donnees
EP97650019A EP0810737A3 (fr) 1996-05-30 1997-05-29 Méthode et dispositif pour réaliser simultanément la compression et l'encryptage de données

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2205127 CA2205127C (fr) 1997-05-12 1997-05-12 Methode et appareil servant a effectuer simultanement une compression et un chiffrement de donnees

Publications (2)

Publication Number Publication Date
CA2205127A1 CA2205127A1 (fr) 1998-11-12
CA2205127C true CA2205127C (fr) 2001-08-28

Family

ID=4160633

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2205127 Expired - Fee Related CA2205127C (fr) 1996-05-30 1997-05-12 Methode et appareil servant a effectuer simultanement une compression et un chiffrement de donnees

Country Status (1)

Country Link
CA (1) CA2205127C (fr)

Also Published As

Publication number Publication date
CA2205127A1 (fr) 1998-11-12

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