One-way accumulators: a decentralized alternative to digital signatures
EUROCRYPT '93 Workshop on the theory and application of cryptographic techniques on Advances in cryptology
A method for obtaining digital signatures and public-key cryptosystems
Communications of the ACM
Handbook of Applied Cryptography
Handbook of Applied Cryptography
Efficient Accumulators without Trapdoor Extended Abstracts
ICICS '99 Proceedings of the Second International Conference on Information and Communication Security
Time-Stamping with Binary Linking Schemes
CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on Advances in Cryptology
Optimally Efficient Accountable Time-Stamping
PKC '00 Proceedings of the Third International Workshop on Practice and Theory in Public Key Cryptography: Public Key Cryptography
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Time (---) Stamping is a cryptographic technique which allows us to prove that an electronic document existed at a certain point in time and that it has not been modified since then. Different time-stamping schemes have already been proposed. Most of them use the concept of trusted Time-stamping Authority (TSA). A TSA is in charge of time-stamping scheme using al Local Time-stamping System (LTS). The main idea can be summarised as follows: digests of the documents to be time-stamped are sent to a Local Time-stamping System (LTS) The LTS accumulates the digests into a round value using a round based protocol. The round value is then time-stamped by a trusted and official TSA. We show how this time-stamping scheme could be useful for an organisation such as a digital library or a company.