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authorBodo Möller <bodo@openssl.org>2002-03-05 15:30:41 +0000
committerBodo Möller <bodo@openssl.org>2002-03-05 15:30:41 +0000
commitb8b09625dc699e01dd5d73f0fe3b081c01efb683 (patch)
tree3fb260d9d7541d79fe106c2c7a1eb38ce0e02541 /doc
parent54d78c477880b0fb608ba539e475e3713c12284f (diff)
Rephrase statement on the security of two-key 3DES.
[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.]
Diffstat (limited to 'doc')
-rw-r--r--doc/crypto/des_modes.pod4
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/crypto/des_modes.pod b/doc/crypto/des_modes.pod
index 36b77c454d..da75e8007d 100644
--- a/doc/crypto/des_modes.pod
+++ b/doc/crypto/des_modes.pod
@@ -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 *