ARITHMETIC COMPRESSING ENCRYPTION APPARATUS, ARITHMETIC COMPRESSING ENCRYPTION METHOD, AND PROGRAM

Details for Australian Patent Application No. 2002225446 (hide)

Owner TANAKA, Kiyosi

Inventors TANAKA, Kiyosi

Pub. Number AU-A-2002225446

PCT Pub. Number WO2002/058038

Priority 2001-013886 22.01.01 JP

Filing date 21 January 2002

Wipo publication date 30 July 2002

International Classifications

G09C 001/00 Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system

G09C 005/00 Ciphering or deciphering apparatus or methods not provided for in other groups of this subclass, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages

H04N 001/411 Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission - for the transmission or reproduction of two-tone pictures, e.g. black and white pictures

H04N 001/44 Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission - Secrecy systems

H03M 007/40 Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits - Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code

Event Publications

13 February 2003 Application Open to Public Inspection

  Published as AU-A-2002225446

5 February 2004 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

  This application lapsed under section 142(2)(f)/See Reg. 8.3(3). Examination has not yet been requested or directed for this application. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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