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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Everlasting Multi-party Computation
verfasst von : Dominique Unruh
Erschienen in: Advances in Cryptology – CRYPTO 2013
Verlag: Springer Berlin Heidelberg
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A protocol has everlasting security if it is secure against adversaries that are computationally unlimited
after
the protocol execution. This models the fact that we cannot predict which cryptographic schemes will be broken, say, several decades after the protocol execution. In classical cryptography, everlasting security is difficult to achieve: even using trusted setup like common reference strings or signature cards, many tasks such as secure communication and oblivious transfer cannot be achieved with everlasting security. An analogous result in the quantum setting excludes protocols based on common reference strings, but not protocols using a signature card. We define a variant of the Universal Composability framework, everlasting quantum-UC, and show that in this model, we can implement secure communication and general multi-party computation using signature cards as trusted setup.