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Created page with "'''SMASH''' is a cryptographic hash function which was created by Lars R. Knudsen. SMASH comes in two versions: 256-bit and 512-bit. Each version was supposed to rival..."

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'''SMASH''' is a [[cryptographic hash function]] which was created by [[Lars R. Knudsen]]. SMASH comes in two versions: 256-bit and 512-bit. Each version was supposed to rival [[SHA-256]] and [[SHA-512]], respectively, however, shortly after the SMASH presentation at [[FSE 2005]], an attack vector against SMASH was discovered which left the hash broken.

== Specifications ==
The message length was limited to less than 2<sup>128</sup> for SMASH-256 and 2<sup>256</sup> for SMASH-512.

== Definition ==

Input: 256/512-bit message blocks <math>m_1, m_2, ... ,m_t</math> and <math>\theta \in GF(2^n)</math>

* <math> h_0 = f(iv) \oplus iv </math>
* <math> h_i = h(h_{i-1},m_i) = f(h_{i_1}\oplus m_i) \oplus m_i \oplus \theta m_i</math>
* <math> h_{t+1} = f(h_t) \oplus h_t </math>

The function f is a complex compression function consisting of H-Rounds and L-Rounds using [[S-boxes]], linear diffusion and variable rotations.

== Details ==
The [[S-boxes]] in SMASH are derived versions from the [[Serpent (cipher)|Serpent]] ones.

==Source==

[http://wikipedia.org/ http://wikipedia.org/]

[[Category:Cryptography]]
[[Category:Cryptographic algorithms]]
==See Also on BitcoinWiki==
* [[VanillaPlay]]
* [[Assistive Reality ARX]]
* [[WILLTOKEN]]
* [[TruePlay]]
* [[Planport]]

SMASH (hash) - Revision history

Admin: Created page with "'''SMASH''' is a cryptographic hash function which was created by Lars R. Knudsen. SMASH comes in two versions: 256-bit and 512-bit. Each version was supposed to rival..."