Date: Sat, 08 Apr 2006 20:31:53 -0500 From: Dennis Olvany <dennisolvany@...il.com> To: john-users@...ts.openwall.com Subject: Re: hash collisions Solar Designer wrote: > For most hash types, the number of inputs is also finite - even in > theory. And it is finite for all of them in practice. Do you refer to password hashing specifically? Algorithms such as MD5 and SHA1 digest the entire input, correct? So, while I suppose that the input may be finite I would venture to guess that it is only limited by a maximum file size, which is certainly far beyond 56 bits. > [crypt] input is truncated to 56 bits Crypt truncates to eight characters, right? I am thinking that 8 characters at 8 bits per character is 64 bits. The most significant bit in each character is removed because it is always zero? Perhaps it causes a cryptographic weakness for every eighth bit to be a zero?
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