Finding Collisions in the Full SHA-1

نویسندگان

  • Xiaoyun Wang
  • Yiqun Lisa Yin
  • Hongbo Yu
چکیده

In this paper, we present new collision search attacks on the hash function SHA-1. We show that collisions of SHA-1 can be found with complexity less than 2 hash operations. This is the first attack on the full 80-step SHA-1 with complexity less than the 2 theoretical bound.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Finding Good Differential Patterns for Attacks on SHA-1

In this paper we describe a method of finding differential patterns that may be used to attack reduced versions of SHA-1. We show that the problem of finding optimal differential patterns for SHA-1 is equivalent to the problem of finding minimal weight codeword in a linear code. Finally, we present a number of patterns of different lengths suitable for finding collisions and near-collisions and...

متن کامل

Finding Near-Optimum Message Scheduling Settings for SHA-256 Variants Using Genetic Algorithms

One-way hash functions play an important role in modern cryptography. Matusiewicz et al. proved that the message scheduling is essential for the security of SHA256 by showing that it is possible to find collisions with complexity 2 hash operations for a variant without it. In this article, we first proposed the conjecture that message scheduling of SHA algorithm has higher security complexity (...

متن کامل

Near-Collisions of SHA-0

In this paper we find two near-collisions of the full compression function of SHA-0, in which up to 142 of the 160 bits of the output are equal. We also find many full collisions of 65-round reduced SHA-0, which is a large improvement to the best previous result of 35 rounds. We use the very surprising fact that the messages have many neutral bits, some of which do not affect the differences fo...

متن کامل

Finding Collisions for Reduced Luffa-256 v2

Luffa is a family of cryptographic hash functions that has been selected as a second round SHA-3 candidate. This paper presents the first collision finding analysis of Luffa-256 v2 which is the 256-bit hash function in the Luffa family. We show that collisions for 4 out of 8 steps of Luffa can be found with complexity 2 using sophisticated message modification techniques. Furthermore, we presen...

متن کامل

Automated Search for Round 1 Differentials for SHA-1: Work in Progress

Wang, Yin and Yu [24] describe a high probability differential path for SHA-1. Since then, various researchers have proposed techniques for improving the speed of finding collisions based on existing differential paths. The speed could be further improved by finding differentials through Round 1 (the first 20 steps) that are optimized to the particular technique. This paper describes progress o...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2005