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1. (US4074066) Message verification and transmission error detection by block chaining

专利局 : 美国
申请号: 05680404 申请日: 26.04.1976
公布号: 4074066 公布日: 14.02.1978
授权号: 4074066 授权日: 14.02.1978
公布类型: A
国际专利分类:
G09C 1/00
G06F 21/22
H04L 9/06
H04L 12/22
G PHYSICS
09
教育;密码术;显示;广告;印鉴
C
用于密码或涉及保密需要的其他用途的编码或译码装置
1
通过对符号或符号组进行转换或者按照预定的系统用另外的符号来替代,将所给出的符号序列,例如可理解的原文,交换成不可理解的符号序列的装置或方法
G PHYSICS
06
计算;推算;计数
F
电数字数据处理
21
防止未授权行为的保护计算机、其部件、程序或数据的安全装置
22
通过限制访问或处理程序或过程
H 电学
04
电通信技术
L
数字信息的传输,例如电报通信
9
保密或安全通信装置
06
使用移位寄存器或存储器用于块式码的密码装置,例如dES系统
H 电学
04
电通信技术
L
数字信息的传输,例如电报通信
12
数据交换网络
02
零部件
22
防止未经允许从数据传输信道取出数据的装置
申请人: International Business Machines Corporation
发明人: Ehrsam William F.
Meyer Carl H. W.
Smith John L.
Tuchman Walter L.
代理人: Lester Edwin
优先权数据:
标题: (EN) Message verification and transmission error detection by block chaining
摘要: front page image
(EN)

A message transmission system for the secure transmission of multi-block data messages from a sending station to a receiving station. PAL The sending station contains cryptographic apparatus operative in successive cycles of operation during each of which an input block of clear data bits is ciphered under control of an input set of cipher key bits to generate an output block of ciphered data bits for transmission to the receiving station. Included in the cryptographic apparatus of the sending station is means providing one of the inputs for each succeeding ciphering cycle of operation as a function of each preceding ciphering cycle of operation. As a result, each succeeding output block of ciphered data bits is effectively chained to all preceding cycles of operation of the cryptographic apparatus of the sending station and is a function of the corresponding input block of clear data bits, all preceding input blocks of clear data bits and the initial input set of cipher key bits.