System and method for performing a trust-preserving...

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique

Reexamination Certificate

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C713S181000

Reexamination Certificate

active

07996679

ABSTRACT:
A data migration system performs a tamper-resistant data migration for regulatory compliance systems. The system generates a secure hash for the data object, adds a timestamp to the hash, produces a signature for the data object using a private key, and includes the signature in a signature summary of data objects. Immediately prior to data migration, the system signs the signature summary of the set of data objects to be migrated. The signature of the data object maintains integrity of the data object by preventing undetectable modification to a data object during migration. The signed signature summary maintains completeness by preventing undetectable removal of a data object from or insertion of a data object into the set of data objects during migration.

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