On Fri, 23 Jul 2021 20:00, Jonathan Kaczynski said: > I'm trying to understand the scenario in which we see the log message, > "gpg: used key is not marked for encryption use." I haven't been able to > find any mentions of the phrase on the web, so I turned to the source code.
This is a warning that the encryption tool used a key which it should not have used for encryption (ie. a signing signing key). Proper OpenPGP implementation won't allow to encrypt to such a key but some implementations have bugs. Technically the keys can be used for both purposes but out of crypto hygiene this should not be done. No immediate risk, though. For S/MIME is is quite common to use the same key for encryption and signing. Salam-Shalom, Werner -- Die Gedanken sind frei. Ausnahmen regelt ein Bundesgesetz.
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