Encryption apparatus using data encryption standard algorithm
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United States of America Patent
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Aug 29, 2006
Grant Date -
Jan 31, 2002
app pub date -
Jun 12, 2001
filing date -
Jun 12, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An encryption apparatus using a DES encryption algorithm is disclosed. The apparatus for encrypting 64-bit plain text blocks includes: input buffering unit for receiving a plain text block byte-by-byte and outputting a first and a second 32-bit plain text blocks in response to a first clock; encryption unit for performing time multiplexed encryption of the first and the second 32-bit plain text blocks in response to the first clock and a second clock, thereby generating a first and a second 32-bit cipher text blocks; and output buffering unit for receiving the first and the second 32-bit cipher text blocks in response to the second clock and outputting eight 8-bit cipher text blocks.
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