Title:
【発明の名称】暗号化/復号方法および装置
Document Type and Number:
Japanese Patent JP2628660
Kind Code:
B2
Abstract:
The invention relates to a method of enciphering information-containing digital data signals with the aid of enciphering keys and of deciphering a message thus enciphered, utilizing the same key. For usages in which high demands are made on the quality of enciphering the conventional method - the EX-OR adding together of clear text and key text on a bit basis - has shortcomings. The invention has for its object to provide a very reliable method with which furthermore the propagation of errors caused by any transmission errors is prevented. This is accomplished in that the (clear) text characters to be enciphered are processed using an enciphering key which is derived from a key text and that the nature of the processing operation performed on the clear text characters is determined by an instruction command which is also derived from the key text.
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Inventors:
Cornelis Johannes Andrianus Janssen
Application Number:
JP28407187A
Publication Date:
July 09, 1997
Filing Date:
November 10, 1987
Export Citation:
Assignee:
Philips Electronics Nemrose Fennaught Shap
International Classes:
H04L9/06; H04L9/00; H04L9/16; H04L9/26; (IPC1-7): H04L9/16; G09C1/00; H04L9/06
Domestic Patent References:
| JP60169959A | ||||
| JP5983434A | ||||
| JP5832380B2 | ||||
| JP5435441B2 |
Other References:
【文献】池野信一、小山謙二著「現代暗号理論」電子情報通信学会編(昭和61年9月1日)P.33,63~76
Attorney, Agent or Firm:
Akihide Sugimura (1 outside)