The paper has been presented at the International Conference Pioneers of Bulgarian
Mathematics, Dedicated to Nikola Obreshkoff and Lubomir Tschakaloff , Sofia, July, 2006.
The material in this paper was presented in part at the 11th Workshop on Selected Areas in Cryptography (SAC) 2004
This paper investigates the security of Proactive Secret Sharing
Schemes. We first consider the approach of using commitment to 0 in the
renewal phase in order to refresh the player's shares and we present...
The paper has been presented at the International Conference Pioneers of Bulgarian Mathematics, Dedicated to Nikola Obreshkoff and Lubomir Tschakaloff , Sofia, July, 2006. The material in this paper was presented in part at INDOCRYPT 2002
This paper is about unconditionally secure distributed protocols
for oblivious transfer, as proposed by Naor and Pinkas and generalized by
Blundo et al. In this setting a Sender has ζ secrets and a Receiver is
interested in one of them. The Sender distributes...
This work was presented in part at the 8th International Conference on Finite Fields and
Applications Fq^8 , Melbourne, Australia, 9-13 July, 2007.
In this paper, we study the ratio θ(n) = λ2 (n) / ψ2 (n), where λ2 (n) is
the number of primitive polynomials and ψ2 (n) is the number of irreducible
polynomials in GF (2)[x] of degree n. Let n = ∏ pi^ri, i=1,..l
be the prime factorization of n. We show that, for fixed l and ri , θ(n) is close to 1 and θ(2n) is
not less than 2/3 for sufficiently...
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