Document integrity verification preparation

Details Document integrity verification preparation Document integrity verification preparation

2011-01-25

2011-01-25

Rones, Charles (Department: 2164)

Data processing: database and file management or data structures

Data integrity

Policy, rule-based management of records, files, and documents

Reexamination Certificate

active

07877365

ABSTRACT:
A system and method are disclosed for rendering published documents tamper evident. Embodiments render classes of documents tamper evident with cryptographic level security or detect tampering, where such security was previously unavailable, for example, documents printed using common printers without special paper or ink. Embodiments enable proving the date of document content without the need for expensive third party archival, including documents held, since their creation, entirely in secrecy or in untrustworthy environments, such as on easily-altered, publicly-accessible internet sites. Embodiments can extend, by many years, the useful life of currently-trusted integrity verification algorithms, such as hash functions, even when applied to binary executable files. Embodiments can efficiently identify whether multiple document versions are substantially similar, even if they are not identical, thus potentially reducing storage space requirements.

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