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Re: Silicon.fr reporting GSM crypto broken
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  • To: [EMAIL PROTECTED]
  • Subject: Re: Silicon.fr reporting GSM crypto broken
  • From: [EMAIL PROTECTED] (David Wagner)
  • Date: Thu, 4 Sep 2003 22:07:03 +0000 (UTC)
  • Distribution: isaac
  • Newsgroups: isaac.lists.ukcrypto
  • Organization: University of California, Berkeley
  • References: <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
  • Reply-to: [EMAIL PROTECTED]
  • Sender: [EMAIL PROTECTED]
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David Wagner wrote:
>GSM compresses before encrypting.  This means that some of the input to
>the encryption is known.

Argh!  I misspoke.  That's not what I meant to write.  I meant to
say that GSM applies an error-correcting code before encrypting.
The error-correcting code introduces redundancy, which means that some
of the input to the A5 cipher is known.  My apologies for my error.
 
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