[OT] passphrases Was: Re: Allowing paste into pinentry-gtk-2?

Robert J. Hansen rjh at sixdemonbag.org
Sun Apr 17 05:02:24 CEST 2011

> While I'm not disputing that you've created a reasonably strong
> passphrase, my original point was that any passphrase that isn't fully
> random has a reduced keyspace. I'm not enough of a mathemagician to
> say how much it's reduced, but it's certainly reduced by a non-zero
> amount.

The best numbers I've seen regarding passphrase entropy suggest that plain English text has in the neighborhood of 1.5 to 2.5 bits of entropy per glyph.  Just FYI.  You can find these numbers in Shannon's original works on entropy, among other places.

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