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EUROCRYPT
1998
Springer

Securing Threshold Cryptosystems against Chosen Ciphertext Attack

11 years 5 months ago
Securing Threshold Cryptosystems against Chosen Ciphertext Attack
For the most compelling applications of threshold cryptosystems, security against chosen ciphertext attack is a requirement. However, prior to the results presented here, there appeared to be no practical threshold cryptosystems in the literature that were provably chosen-ciphertext secure, even in the idealized random oracle model. The contribution of this paper is to present two very practical threshold cryptosystems, and to prove that they are secure against chosen ciphertext attack in the random oracle model. Not only are these protocols computationally very efficient, but they are also non-interactive, which means they can be easily run over an asynchronous communication network.
Victor Shoup, Rosario Gennaro
Added 05 Aug 2010
Updated 05 Aug 2010
Type Conference
Year 1998
Where EUROCRYPT
Authors Victor Shoup, Rosario Gennaro
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