Page Substitution Verification Preparation

  • Published: Sep 5, 2017
  • Earliest Priority: Mar 22 2008
  • Family: 16
  • Cited Works: 18
  • Cited by: 1
  • Cites: 34
  • Additional Info: Full text

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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Document History
  • Publication: Sep 5, 2017
  • Application: Aug 22, 2016
    US US 201615243657 A
  • Priority: Aug 22, 2016
    US US 201615243657 A
  • Priority: Apr 6, 2014
    US US 201414246115 A
  • Priority: Jul 29, 2012
    US US 201213561062 A
  • Priority: Nov 27, 2010
    US US 95486410 A
  • Priority: Dec 15, 2009
    US US 63774809 A
  • Priority: Mar 22, 2008
    US US 5356008 A

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