In this paper, we study the existence of multicollisions in iterated hash functions. We show
that finding multicollisions, ie r-tuples of messages that all hash to the same value, is not …

This paper deals with the security of iterated hash functions against generic attacks, such as,
eg, Joux'multicollision attacks from Crypto 04. The core idea is to increase the size of the …

The concept of zero-knowledge (ZK) has become of fundamental importance in
cryptography. However, in a setting where entities are modeled by quantum computers …

MD2 is an early hash function developed by Ron Rivest for RSA Security, that produces
message digests of 128 bits. In this paper, we show that MD2 does not reach the ideal …

A sensitivity index quantifies the degree of smoothness with which it responds to fluctuations
in the wishes of the members of a voting body. This paper characterizes the Banzhaf …

In this paper a new approach to fragile watermarking technique is introduced. This problem
is particularly interesting in the field of modern multimedia applications, when image and …

Most of the currently accepted designs for cryptographic hash functions are in the style of a
block cipher in feed-forward mode. With increasing interest in all forms of cryptanalysis, this …

For arbitrary Boolean functions, an easy counting argument shows that there must exist non
normal functions of n variables for n> 10. It was even shown in [21] that, for increasing …

Modern business creates an increasing need for sharing, querying and mining information
across autonomous enterprises while maintaining privacy of their own data records. The …

In the past thirty years, cryptology has evolved from a secret art to a modern science. Weaker
algorithms and algorithms with short keys are disappearing, political controls of …