Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-08-23
2005-08-23
Zand, Kambiz (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S167000, C713S193000, C380S201000, C380S228000, C380S028000, C705S057000
Reexamination Certificate
active
06934847
ABSTRACT:
MAC values formed with respect to each file belonging to a directory122A and ICVs (D-ICVc) formed on the basis of the MAC values of all files belonging to the directory122A are stored into a sequence page121A. Sequence pages121A,121B, . . . formed respectively with respect to all of directories122A,122B, . . . on a disk and the ICVs formed on the basis of the D-ICVs stored in all of the sequence pages121A,121B, . . . are stored into a sequence block114.Since the MAC values are closed and managed every directory by the sequence pages121A,121B, . . . , a data alteration check can be executed every directory. An alteration check of data recorded on a recording medium can be efficiently performed.
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Frommer William S.
Frommer & Lawrence & Haug LLP
Zand Kambiz
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