Re: MD5 or SHA1 or ???

From: William Stacey [MVP] (staceyw_at_mvps.org)
Date: 08/12/05

  • Next message: David Carr: "Re: How to send certificate for client authentication?" 
    Date: Thu, 11 Aug 2005 19:12:57 -0400

    The hash space is finite. The data space that you might hash is infinite.
    It follows there is an infinite number of hash collisions. 

    -- 
William Stacey [MVP]
"Alfredo" <abarrientos@gmail.com> wrote in message 
news:1123783237.815413.285130@g47g2000cwa.googlegroups.com...
> Thank you very much William,
>
> But, I dont understand how is possible to get a diferent hash value for
> numbers from 1 to 1 000 000 000 000 000 000 000 000 000 000 000 000, if
> my maximun combination is 1 00 000 000 000 000 000 000 000 000 000 000
> - 1?
>
> Thanks,
>
> Alfredo Barrientos
>
  • Next message: David Carr: "Re: How to send certificate for client authentication?"

    Relevant Pages

    • Re: compare-by-hash (was Re: sharing /etc/passwd)
      ... Hash: SHA1 ... infinite number of inputs, you are guaranteed an infinite number of ... > blocks comparing as equal exists, ... hashes to generate a collision. ...
      (FreeBSD-Security)
    • Re: Instances of deliberate, full MD5 collision?
      ... There are provably an infinite ... :> number of clear texts which hash to the same value. ... chunks had not been present at all. ...
      (comp.security.misc)
    • Re: XML Encryption
      ... Only one bit can change the SHA hash result a lot. ... > Imports System.Collections ... >> William Stacey, MVP ...
      (microsoft.public.dotnet.xml)
    • Re: [Full-disclosure] Month of Random Hashes: DAY THREE
      ... On Fri, 15 Jun 2007, Brian Dessent wrote: ... inputs and a finite number of outputs, just like any other hash ... an infinite number of corresponding inputs. ... Hosted and sponsored by Secunia - http://secunia.com/ ...
      (Full-Disclosure)
    • Re: Revert MD4
      ... possibles COLLISIONS that means that a file has the ... same hash value as the original but with a infinite ... the cryptographic attacks on md4 are different ...
      (sci.math)