Differences between version 3 and predecessor to the previous major change of 3DES.
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| Newer page: | version 3 | Last edited on Saturday, February 28, 2009 1:47:58 pm | by LawrenceDoliveiro | Revert |
| Older page: | version 2 | Last edited on Sunday, December 5, 2004 1:08:52 pm | by AristotlePagaltzis | Revert |
@@ -1,6 +1,8 @@
-An [Acronym] for Tripple
[DES].
+An [Acronym] for Triple
[DES].
-A version
of the
[DES] encryption [Algorithm]
in which the basic algorithm is applied three times, in
an encryption step, a decryption step and an
encryption step. By default
the keys for
the first
two are the same so only the last encryption step is effective, meaning that compatibility with
existing steps is maintained
.
+A variant
of [DES] encryption in which the basic [
algorithm|Algorithm]
is applied three times, with
an encryption step, followed by
a decryption step and then another
encryption step. The first and third encryption steps use
the same key, while the middle step uses a different one. Can be used in a compatibility mode where
the two keys
are the same so only the last encryption step is effective, turning it into normal DES.
+
+Developed as a way to get around weaknesses (real or suspected) in DES, it's really only useful to take advantage of an
existing DES implementation (e.g. system library or hardware chip). More modern encryption algorithms like [AES] offer at least as good security, and are faster
.
----
CategoryCryptography
