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Auflistung nach Schlagwort "semantic security"

1 - 2 von 2
  • Konferenzbeitrag
    A cryptosystem "à la" ElGamal on an elliptic curve over Fp[ϵ]
    (WEWoRC 2005 – Western European Workshop on Research in Cryptology, 2005) Virat, Marie
    This paper introduces a new public key cryptosystem which is a variant of the ElGamal cryptosystem on an elliptic curve. To this end, we study the equations of type y2 = x3 + ax + b with a and b in Fq[ϵ] where ϵ2 = 0. When 4a3 + 27b2 is invertible in Fq[ϵ], they allow us to define new groups which seem to be good candidates for the ElGamal public key cryptosystem. The variant we introduce has the advantage to present no plaintext encoding problem. Moreover, it reaches security levels which are similar to the ElGamal cryptosystem on an elliptic curve.
  • Konferenzbeitrag
    Publicly verifiable secret sharing from paillier's cryptosystem
    (WEWoRC 2005 – Western European Workshop on Research in Cryptology, 2005) Ruiz, Alexandre; Villar, Jorge L.
    In this paper we propose a simple PVSS scheme based on the homomorphic properties of Paillier's encryption scheme. This new scheme is the first known PVSS scheme based on the decisional composite residuosity assumption. The verification process in this scheme is much simpler than in the other known schemes. Furthermore, in our proposal, verification is made non-interactive without using the Fiat-Shamir technique or any additional Zero Knowledge proof.