Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2005-02-01
2005-02-01
Barron, Gilberto (Department: 2132)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C713S001000, C713S182000, C713S193000, C713S152000, C710S107000, C710S110000, C710S200000, C710S244000
Reexamination Certificate
active
06851056
ABSTRACT:
An access control function for an integrated system is provided which determines data access based on the master id of a requesting master within the system and the address of the data. The access control function can be inserted, for example, into the data transfer path between bus control logic and one or more slaves. In addition to determining whether to grant access to the data, the access control function can further qualify the access by selectively implementing encryption and decryption of data, again dependent on the data authorization level for the particular functional master initiating the request for data.
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Evans Edward K.
Foster Eric M.
Franklin Dennis E.
Hall William E.
Barron Gilberto
Heslin Rothenberg Farley & & Mesiti P.C.
International Business Machines - Corporation
Nobahar A.
Schnurmann H. Daniel
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