The cryptosystem recently proposed by Cramer and Shoup [CS98] is a practical public key cryptosystem that is secure against adaptive chosen ciphertext attack provided the Decision...
Cryptography is more and more concerned with elaborate protocols involving many participants. In some cases, it is crucial to be sure that players behave fairly especially when the...
One of the basic problems in cryptography is the generation of a common secret key between two parties, for instance in order to communicate privately. In this paper we consider in...
Given d independent pseudorandom permutations (PRPs) i, . . . , d over {0, 1}n , it appears natural to define a pseudorandom function (PRF) by adding (or XORing) the permutation re...