Perfectly-secure cryptography is a branch of information-theoretic cryptography. A perfectly-
secure cryptosystem guarantees that the malicious third party cannot guess anything …

Based on some recent results derived from the Shannon theory of secrecy systems, this
paper develops a new mathematical model for an infinite cryptosystem with perfect secrecy …

In this chapter, we first introduce entropy and some basic concepts related to information
theory. We show how entropy has find its way from thermodynamics into information theory …

We introduce a new protocol that achieves Shannon perfect secrecy performance using
significantly lower key size than the original approach of one-time pad. We achieve this goal …

Ring signatures, introduced by Ron Rivest, Adi Shamir and Yael Tauman [7], allow a signer
to produce a signature on behalf of a group of users, called ring, while the signature hides …

Perfectly secure cryptography is a branch of information-theoretic cryptography. A perfectly
secure cryptosystem guarantees that the malicious third party cannot guess anything …