Apparatus for generating encryption/decryption look-up tables using a session key
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United States of America Patent
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Nov 3, 1998
Grant Date -
N/A
app pub date -
Sep 20, 1996
filing date -
Mar 23, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An encryption/decryption apparatus enables encrypted communication between two stations each incorporating such an apparatus. The apparatus is arranged to generate a set of look-up tables in accordance with a session key and temporarily store these tables in memory, and to convert each successive element, such as a character, of a message to a code through use of the look-up tables. The session key can be changed as often as desired but the fresh set of look-up are created quickly each time; then the conversion process for each element of the message is carried out quickly yet maintaining a high level of security.
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