On 08/22/2013 01:57 AM, Frank wrote:
> My apologies if this has come up before. I notice Serpent-256 is
> available in libgcrypt. Is it available in GPG?
No. SERPENT is not part of the standard OpenPGP cipher profile, and
GnuPG implements the OpenPGP specification quite closely.
>From section 9.2 of RFC4880, the following symmetric cipher profiles are
defined:
* Plaintext
* IDEA
* Triple DES with three independent subkeys
* CAST5-128
* Blowfish-128
* AES-128
* AES-192
* AES-256
* Twofish-256
GnuPG extends this with support for Camellia-128, Camellia-192 and
Camellia-256. I don't know the reasoning for introducing Camellia, but
I'm sure there's a solid basis for it.
The best way to get GnuPG to support SERPENT is to convince the IETF
OpenPGP Working Group to add SERPENT to the symmetric cipher profiles.
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