Length for AES256 symmetric encryption passphrase?

Sam Gleske sam.mxracer at gmail.com
Fri Apr 4 16:48:26 CEST 2014

On Fri, Apr 4, 2014 at 10:46 AM, Sam Gleske <sam.mxracer at gmail.com> wrote:

> On Fri, Apr 4, 2014 at 2:04 AM, Robert J. Hansen <rjh at sixdemonbag.org>wrote:
>> Using plain English for the passphrase, a 170-character passphrase is
>> necessary to provide a full 256 bits of entropy.
> Interesting math.  However, I believe the OP mentioned they're generating
> the password and storing so human readable, i.e. English, isn't an issue.
> What would be the recommended length for completely random characters
> generated, for example, by a password manager such as keepassx?

To clarify and be more specific... if one were using the password as the
symmetric key in the GPG software (libcrypt)?  Or perhaps even just using
openssl tools?
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