Multicollision Attack on a recently proposed hash function vMDC-۲
Publish place: Journal of Computing and Security، Vol: 3، Issue: 4
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JCSE-3-4_002
تاریخ نمایه سازی: 12 دی 1400
Abstract:
In this paper, we describe an attack on a new double block length hash function which was proposed as a variant of MDC-۲ and MDC-۴. The vMDC-۲ compression function is based on two calls to a block cipher that compresses a ۳n-bit string to a ۲n-bit one. This attack is based on the Joux's multicollision attack, where we show that an adversary wins finding collision game by requesting ۲^{۷۰} queries for n=۱۲۸-bit block cipher that is much less than the complexity of birthday attack.
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Authors
Zahra Zolfaghari
Shahid Rajaee Teacher Training University
Hamid Asadollahi
Shahid Rajaee Teacher Training University
Nasour Bagheri
Shahid Rajaee Teacher Training University