Analysis of Property-Preservation Capabilities of the ROX and ESh Hash Domain Extenders

Abstract. Two of the most recent and powerful multi-property-preserving (MPP) hash domain extension transforms are the Ramdom-Oracle-XOR (ROX) transform and the Enveloped Shoup (ESh) transform. The former was proposed by Andreeva et al. at ASIACRYPT 2007 and the latter was proposed by Bellare and Ristenpart at ICALP 2007. In the existing literature, ten notions of security for hash functions have been considered in analysis of MPP capabilities of domain extension transforms, namely CR, Sec, aSec, eSec (TCR), Pre, aPre, ePre, MAC, PRF, PRO. Andreeva et al. showed that ROX is able to preserve seven properties; namely collision resistance (CR), three flavors of second preimage resistance (Sec, aSec, eSec) and three variants of preimage resistance (Pre, aPre, ePre). Bellare and Ristenpart showed that ESh is capable of preserving five important security notions; namely CR, message authentication code (MAC), pseudorandom function (PRF), pseudorandom oracle (PRO), and target collision resis...

• Type: Conference
• Year: 2009
• Where: ACISP
• Authors: Mohammad Reza Reyhanitabar, Willy Susilo, Yi Mu
• Keywords: ACISP 2009, Andreeva Et Al, Domain Extension Transforms, Hash Domain Extension, Security Privacy