Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2008-01-29
2008-01-29
Zand, Kambiz (Department: 2134)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
Reexamination Certificate
active
07325130
ABSTRACT:
A method for guaranteeing freshness of results for queries against a non-secure data store extends a write operation to include steps of: receiving a write instruction for application data to be written into a hierarchical tree structure; incrementing a timer responsive to receiving the write instruction; setting a timestamp to the value of the timer; computing a message authentication code based on the received application data and the timestamp; appending control information to the application data and its corresponding check item; the control information including the timestamp, a link to a check entry, and the message authentication code; writing the application data with the appended control information to the data store as a primary item; and updating the control information for each check item associated with the primary item along a path from the primary item to a root by following links.
REFERENCES:
patent: 6314409 (2001-11-01), Schneck et al.
patent: 6584507 (2003-06-01), Bradley et al.
patent: 6772337 (2004-08-01), Yener
August Casey P.
Buchenhorner Michael J.
International Business Machines - Corporation
Wyszynski Aubrey H
Zand Kambiz
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