Re: Security for embedded device

From: David Wagner (daw_at_taverner.cs.berkeley.edu)
Date: 06/29/04


Date: Tue, 29 Jun 2004 09:08:01 +0000 (UTC)

Joris Dobbelsteen wrote:
>Does anyone know a simple cipher for a 8-bit processor with only a few bytes
>of available memory, doing its job without about 1K cycles?

Assuming you have some ROM: have you looked at Skipjack? DES? AES?
Your performance goals sound quite aggressive. Almost certainly you
will need at least 8 bytes of memory, merely to hold the key.



Relevant Pages

  • Re: 3-Way Described on web site
    ... implemented using very little memory. ... added would, of course, make the cipher slower and increase its memory ...
    (sci.crypt)
  • Re: Security for embedded device
    ... >will need at least 8 bytes of memory, ... I once did a very insecure "cipher" by simply filling up a block of ROM ... Do you have an "impossible" engineering project that only someone like Doc Brown can solve? ...
    (sci.crypt)
  • Re: sci.crypt sandbox?
    ... Perhaps the scoring system should be changed: ... less memory it uses the higher the score. ... Also, when a cipher uses ... It shouldn't be that hard to include the speed into the rating system, ...
    (sci.crypt)
  • Re: expensive password hash
    ... > Since it happened to me that I forgot passwords I want to use easier ... Frequently negating memory contents shall ... > # or combine hash functions for additional security ... > # feed aes() with aesand fill buffer with it ...
    (sci.crypt)
  • expensive password hash
    ... Since it happened to me that I forgot passwords I want to use easier ... guessing I want to make an expensive hash function ... Frequently negating memory contents ... # feed aes() with aesand fill buffer with it ...
    (sci.crypt)