[hashcash] Re: SHA-1 Broken - from the sha-na-na dept.

  • From: hal@xxxxxxxxxx ("Hal Finney")
  • To: hashcash@xxxxxxxxxxxxx
  • Date: Wed, 16 Feb 2005 09:22:35 -0800 (PST)

Keep in mind that hashcash is not based on hash collisions.  It uses
partial pre-images of zero (meaning, strings whoses hashes are close to
the all-zero string).  Most commentators agree that the new techniques
will not work to find pre-images.  Chances are that means they will not
be able to accelerate finding partial pre-images either.

Hal Finney

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