University of Wisconsin–River Falls
In this paper, the authors revisit the security notions for dedicated-key hash functions, considering two essential theoretical aspects; namely, formal definitions for security notions, and the relationships among them. Their contribution is twofold. First, they provide a new set of enhanced security notions for dedicated-key hash functions. The provision of this set of enhanced properties has been motivated by the introduction of the enhanced Target Collision Resistance (eTCR) property by the researchers at crypto 2006.