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Rephrase statement on the security of two-key 3DES.

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[Chosen plaintext attack: R. Merkle, M. Hellman: "On the Security of
  Multiple Encryption", CACM 24 (1981) pp. 465-467, p. 776.

  Known plaintext angriff: P.C. van Oorschot, M. Wiener: "A
  known-plaintext attack on two-key triple encryption", EUROCRYPT '90.]
This commit is contained in:
Bodo Möller 2002-03-05 15:30:41 +00:00
parent 54d78c4778
commit b8b09625dc
1 changed files with 2 additions and 2 deletions
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4
doc/crypto/des_modes.pod
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@ -204,8 +204,8 @@ just one key.
=item *
If the first and last key are the same, the key length is 112 bits.
There are attacks that could reduce the key space to 55 bit's but it
requires 2^56 blocks of memory.
There are attacks that could reduce the effective key strength
to only slightly more than 56 bits, but these require a lot of memory.
=item *