Passphrase Encoding and Entropy

Ivan Boldyrev boldyrev+nospam at
Wed Jun 8 15:20:12 CEST 2005

On 9134 day of my life Oskar L. wrote:
> Now if the attacker knows that I have only used the 23 characters
> a-z in the passphrase, then she/he can represent all of them using 5
> bits.

But he also knows that you use ASCII encoding for you passphrase.

> But I don't understand how this helps the attacker, since foobar
> represented this way would obviously produce a completely different
> key (of only 30 bits).


Ivan Boldyrev

                                                  Your bytes are bitten.
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