BSI Guidelines
The German Federal Office for Information Security (BSI) publishes technical guidelines and protection profiles for cryptography.
Some documents are of interests to GnuPG. (Don't rely on the translations, they are just trying to give an idea.)
TR-02102-1 Cryptographic Methods: Recommendations and key lengths
(Original in German) Version 2015-01 from 10th of February 2015. updated yearly
Aims for a security level of 100 bit. Gives recommendations for new crypto systems to be in use until end of 2021.
| block cipher |
|---|
| 128 |
| AES-128, AES-192, AES-256 |
| Block cipher mode of operation |
|---|
| GCM, CBC, CTR |