Haber, Stuart; Stornetta, W. Scott How to time-stamp a digital document. (English) Zbl 0800.68408 Menezes, Alfred J. (ed.) et al., Advances in cryptology - CRYPTO ’90. A conference on the theory and application of cryptography, Univ. of California, Santa Barbara, USA, August 11-15, 1990. Proceedings. Berlin etc.: Springer-Verlag. Lect. Notes Comput. Sci. 537, 437-455 (1991). Summary: 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 procedures maintain complete privacy of the documents themselves, and require no record-keeping by the time-stamping service.For the entire collection see [Zbl 0782.00081]. Cited in 20 Documents MSC: 68P25 Data encryption (aspects in computer science) 94A60 Cryptography Keywords:digital time-stamping PDFBibTeX XMLCite \textit{S. Haber} and \textit{W. S. Stornetta}, Lect. Notes Comput. Sci. 537, 437--455 (1991; Zbl 0800.68408) Full Text: DOI