How to time-stamp a digital document

  title={How to time-stamp a digital document},
  author={S. Haber and W. S. Stornetta},
  journal={Journal of Cryptology},
  • S. Haber, W. S. Stornetta
  • Published 2004
  • Computer Science
  • Journal of Cryptology
  • The prospect of a world in which all text, audio, picture, and video documents are in digital form on easily modifiable media raises the issue of how to certify when a document was created or last changed. The problem is to time-stamp the data, not the medium. We propose computationally practical procedures for digital time-stamping of such documents so that it is infeasible for a user either to back-date or to forward-date his document, even with the collusion of a time-stamping service. Our… CONTINUE READING
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