International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: NESHA-256, NEw 256-bit Secure Hash Algorithm

Yaser Esmaeili Salehani
S. Amir Hossein Ayatollah Esfahani Tabatabaei
Mohammad Reza Sohizadeh Abyaneh
Mehdi Mohammad Hassanzadeh
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Abstract: In this paper, we introduce a new dedicated 256-bit hash function: NESHA-256. The recently contest for hash functions held by NIST, motivates us to design the new hash function which has a parallel structure. Advantages of parallel structures and also using some ideas from the designing procedure of block-cipher-based hash functions strengthen our proposed hash function both in security and in efficiency. NESHA-256 is designed not only to have higher security but also to be faster than SHA-256: the performance of NESHA-256 is at least 38% better than that of SHA-256 in software. We give security proofs supporting our design, against existing known cryptographic attacks on hash functions.
  title={NESHA-256, NEw 256-bit Secure Hash Algorithm},
  booktitle={IACR Eprint archive},
  keywords={Hash function, NIST, Diffusion layer, Differential attack},
  note={ 14259 received 15 Jan 2009},
  author={Yaser Esmaeili Salehani and S. Amir Hossein Ayatollah Esfahani Tabatabaei and Mohammad Reza Sohizadeh Abyaneh and Mehdi Mohammad Hassanzadeh},