04569052 is referenced by 28 patents and cites 3 patents.

An apparatus for protecting computer memory utilizes a parity matrix to generate an n-k check bit signal of an extended linear (n,k,4) code from a k data bit signal. Exclusive-OR gates add the n-k check bit signal to an n-k tag bit signal selected from a predetermined class, to form, when concatenated with the k data bit signal, an element of a code of a certain class. The element comprising the k data bit signal is written in memory. A correction matrix or And gate cooperating with exclusive-OR gates detects an attempt to access the k data bit signal with an n-k key bit signal belonging to the same class as the n-k tag bit signal, but which does not match it.

Title
Coset code generator for computer memory protection
Application Number
6/513895
Publication Number
4569052
Application Date
July 14, 1983
Publication Date
February 4, 1986
Inventor
Abraham Lempel
Haifa
IL
Terry A Welch
Concord
MA, US
Martin Cohn
Arlington
MA, US
Agent
Howard P Terry
Assignee
Sperry Corporation
NY, US
IPC
G06F 11/10
View Original Source