Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2011-04-19
2011-04-19
Zand, Kambiz (Department: 2434)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S168000, C380S028000
Reexamination Certificate
active
07930551
ABSTRACT:
A transmitting and receiving device share a secret which is split into first and second portions. A public function is used to generate a keystream. The length of the keystream is adjusted to equal the length of a message plus the length of the output of an MMH function. The MMH function is calculated as a function of the message and the adjusted keystream. Each L octets, L is the octet length of a MAC, of the output of the MMH function is accumulated into a summation value, which is concatenated with the second secret portion into a concatenation value. The output of the public function, now calculated as a function of the concatenation value, is used in place of a traditional one-time pad to generate the MAC which is sent along with the message to the receiving device.
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Tran Tongoc
Van Aacken Troy A.
Zand Kambiz
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