Title:
INFORMATION CIPHERING DECODING METHOD AND INFORMATION CIPHERING DECODER
Document Type and Number:
Japanese Patent JP3537959
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To easily attain ciphering decoding without giving load to a recipient of a cryptogram by using a decoding program and key information so as to decode the cryptogram into a plain text.
SOLUTION: A ciphering section 1 uses a ciphering program f2 of a ciphering algorithm E selected by a sender user of information from a program group stored in a ciphering library 4 and key information Ks stored in a key information file 3 to plain test data M. A synthesis section 2 synthesizes the cryptogram C which a decoding program fd of the ciphering algorithm E read from the ciphering liberary 4. The synthesized cryptogram C and the decoding program fd are sent to an information recipient. Then a separate section 5 separates received ciphering data into the cryptogram C and the decoding program fd. Moreover, a decoding section 6 decodes the cryptogram C separated by a separate section 5 by using the separated decoding program fd and the key information Ks stored in a key information file 7.
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Inventors:
Okamoto, Eiji
Application Number:
JP19785496A
Publication Date:
June 14, 2004
Filing Date:
July 26, 1996
Export Citation:
Assignee:
Okamoto, Eiji
TOSHIBA CORP
TOSHIBA CORP
International Classes:
G06F13/00; G06F9/445; G09C1/00; H04L9/08; H04L9/14; H04L9/36; (IPC1-7): H04L9/14; G06F9/445; H04L9/08