Wang's sufficient conditions of MD5 are not sufficient
نویسندگان
چکیده
In this paper, we report that the “sufficient conditions” of MD5 [1] of the modification technique for the collision search algorithm described by Wang [2] are not sufficient. In our analysis, we show at least 4 extra-conditions for the message modification in the first block and corrections of the several conditions which are correspond to the highest (32nd) bit of the sufficient conditions in the second block should be needed. And we show the new collision message which is completely different from the message pairs showed in [2] [3] by using our extended sufficient conditions.
منابع مشابه
How to Construct Sufficient Condition in Searching Collisions of MD5
In Eurocrypt 2005, Wang et al. presented a collision attak on MD5. In their paper, they intoduced “Sufficient Condition” which would be needed to generate collisions. In this paper, we explain how to construct sufficent conditions of MD5 when a differential path is given. By applying our algorithm to a collision path given by Wang et al, we found that sufficient conditions introduced by them co...
متن کاملRedundancy of the Wang-Yu Sufficient Conditions
Wang and Yu showed that MD5 was not collision-resistant, but it is known that their sufficient conditions for finding a collision of MD5 includes some mistakes. In this paper, we examine the sufficient conditions by computer simulation. We show that the Wang-Yu conditions include 16 unnecessary conditions for making a collision. Sasaki et al. claimed that modifying one condition made it possibl...
متن کاملImproved Collision Attack on MD5
In EUROCRYPT2005, a collision attack on MD5 was proposed by Wang et al. In this attack, conditions which are sufficient to generate collisions (called “sufficient condition”) are introduced. This attack raises the success probability by modifing messages to satisfy these conditions. In this attack, 37 conditions cannot be satisfied even messages are modified. Therefore, the complexity is 2. Aft...
متن کاملHow to Find the Sufficient Collision Conditions for Haval-128 Pass 3 by Backward Analysis
Wang et al. recently found several collisions in some hash functions, such as MD4, MD5, Haval-128 and RIPEMD. These findings have significantly changed our views about the security of existing hash functions. Unfortunately, although it is easy for us to verify the correctness of the collisions published by Wang et al., the sufficient conditions for collisions are not clear. In this paper, we pr...
متن کاملSufficient global optimality conditions for general mixed integer nonlinear programming problems
In this paper, some KKT type sufficient global optimality conditions for general mixed integer nonlinear programming problems with equality and inequality constraints (MINPP) are established. We achieve this by employing a Lagrange function for MINPP. In addition, verifiable sufficient global optimality conditions for general mixed integer quadratic programming problems are der...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- IACR Cryptology ePrint Archive
دوره 2005 شماره
صفحات -
تاریخ انتشار 2005