Helger Lipmaa's publications

Time-Stamping with Binary Linking Schemes

Ahto Buldas, Peeter Laud, Helger Lipmaa and Jan Villemson. Time-Stamping with Binary Linking Schemes. In Hugo Krawczyk, editor, Advances in Cryptology - CRYPTO '98, 18th Annual International Cryptology Conference, volume 1462 of Lecture Notes in Computer Science, pages 486--501, Santa Barbara, CA, USA, August 23--27, 1998. Springer, Heidelberg. ISBN 3-540-64892-5.

File: [.ps.bz2 (78 KB), .pdf (249 KB)] ps recommended.


We state the basic requirements for time-stamping systems applicable as the necessary support to the legal use of electronic documents. We analyze the main drawbacks of the time-stamping systems proposed to date and present a new system that meets all the stated requirements. We prove that these requirements cannot be significantly tightened..

Keywords: NA.

Comment: See Cuculus Homepage for other time-stamping papers.

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