Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-09-20
2005-09-20
Sheikh, Ayaz (Department: 2131)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S150000, C713S151000, C713S168000, C713S171000, C380S028000, C380S030000, C380S037000, C380S042000
Reexamination Certificate
active
06948067
ABSTRACT:
Methods and apparatus are presented for encrypting and authenticating data, wherein some data is encrypted and some data is not encrypted, but all of the data is authenticated. Different formulations for authentication blocks are used according to whether a block of data occupies a cleartext position or ciphertext position. The authentication blocks are then combined to form a checksum, which is encrypted to form an authentication tag.
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P. Rogaway et al., OCB : A Block-Cipher Mode of Operation for Efficient Authenticated Encryption, Department of Computer Science, University of California at Davis, california,USA, Aug. 3, 2001.
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Hawkes Philip Michael
Rose Gregory G.
(Micky) Minhas Sandip S.
Arani Taghi T.
Choi Jae-Hee
Qualcomm Inc.
Sheikh Ayaz
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