identical files -> non-identical encrypted files
Chris Walters
cwal989 at comcast.net
Tue Jul 22 08:32:21 CEST 2008
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Ian Zimmerman wrote:
| I just noticed this today. I suppose this is completely obvious to most
| readers of the list and perhaps not something they want to be bothered with;
| apalogies if that's the case. I have a problem to solve :(
[snip]
| So I suppose gpg puts some salt probably based on timestamp in. Can this
| be disabled? Pretty please?
As has already been mentioned, this has nothing to do with salt. It has to do
with the fact that the session key - used to encrypt the plaintext - is random,
so it will produce different ciphertext each time to encrypt a file. This is a
good thing, as it makes it much harder to apply a certain type of attack on the
ciphertext. I'm not sure why you would want to disable this security feature.
I will say that I wouldn't use an encryption program that did not use random
session keys.
Regards,
Chris
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