Operator console with paired modules including means for ciphering and deciphering messages therebetween based on a mutually known, exclusive internal security code
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United States of America Patent
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Sep 26, 1989
Grant Date -
N/A
app pub date -
Nov 16, 1987
filing date -
Dec 15, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An operator console for data communication is divided into two separate units which can be connected electrically together, namely a keyboard (10) having a logical unit (21), with a memory (211) and a ciphering/deciphering circuit (22), and a security module (11). Connected between the input side of the keyboard (10) and the memory (211) is a security circuit which disconnects a conduit (240) to the keyboard memory (211), subsequent to a first transfer of a code from the security module (11), and connects instead a conductor (241) to the memory (211) from the ciphering/deciphering circuit (22).
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