I don't think it takes the cube of it. There are 56 bits in one key, and 112 bits in two keys, so there could not be an entropy of more than 112 bits to triple DES. It is no more cryptographically secure than double DES because it uses 2 keys. ------------------------------------------------------------------------- To find out more about the anon service, send mail to help@anon.penet.fi. Due to the double-blind, any mail replies to this message will be anonymized, and an anonymous id will be allocated automatically. You have been warned. Please report any problems, inappropriate use etc. to admin@anon.penet.fi.
wonderer says:
I don't think it takes the cube of it. There are 56 bits in one key, and 112 bits in two keys, so there could not be an entropy of more than 112 bits to triple DES. It is no more cryptographically secure than double DES because it uses 2 keys.
In spite of the "standard" most people do triple DES with three keys. With the two key system, it would take T^2+T time to do the calculation, where T is the time to crack single DES on your machine. Perry
Wonderer wrote:
I don't think it takes the cube of it. There are 56 bits in one key, and 112 bits in two keys, so there could not be an entropy of more than 112 bits to triple DES. It is no more cryptographically secure than double DES because it uses 2 keys.
Wouldn't "triple-DES" imply three keys, or did I miss something?
participants (3)
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an41418＠anon.penet.fi -
Matthew J Ghio -
Perry E. Metzger