On Sun, May 26, 2019 at 11:30:18PM -0700, Procopius via Gnupg-users wrote:
What is the encryption engine for the current GnuPG.
There’s no single symmetric encryption algorithm. OpenPGP allows a set of algorithms: 3DES, IDEA, CAST5, AES, Blowfish, Twofish, and Camellia [1,2]. GnuPG supports all of them.
I know IDEA is proprietary so that can’t be used, is this correct?
All patents on IDEA have now expired and IDEA is supported by GnuPG.
If it’s NIST AES that is under the US Government? Wouldn’t that be in danger of a US back door in the algorithm?
Rijndael was actually designed by a team of Belgian cryptologists. NIST evaluated it amongst the other candidate ciphers of the AES competition and eventually selected it as the winner, but was not involved in its design. [3]
- Damien [1] https://tools.ietf.org/html/rfc4880#section-9.2[2] https://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-13
[3] https://www.nist.gov/news-events/news/2000/10/commerce-department-announces-winner-global-information-security
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