Messages cannot be decrypted [DC 1.2.15, failed: PGP: MissingKey]

[ian]

Related:

PSA: Known interoperability problem in chatmail core <1.160.0

While trying to enable wildcard OpenPGP Key IDs, we have discovered incompatibility in core versions <1.160.0. Key IDs are constructed as the hash of the key fingerprint truncated to 64 bits. They are normally transmitted in plaintext in OpenPGP messages so recipients can identify the PKESK (Public Key Encrypted Session Key) that is intended for them instead of trying to decrypt each PKESK. The disadvantage of this is that part of the key fingerprint is transmitted in plaintext. Because of this…

Error messages in DeltaChat occasionally show cannot decrypt

This does not look like a screenshot from 2.43.0, in 2.43.0 there is no “… sent a message from another device”. Looks more like an old version affected by PSA: Known interoperability problem in chatmail core <1.160.0 Version 1.60.1 of desktop is available at Index of /desktop/v1.60.1/, it is not supported but if you don’t want to upgrade to 2.x and still be able to decrypt messages sent from 2.46+, it should work. Since 2.x there is no such thing as “user has changed device” message in a chat,…

Can't decrypt some messages sent from other app

[This message cannot be decrypted. • It might already help to simply reply to this message and ask the sender to send the message again. • If you just re-installed Delta Chat then it is best if you re-setup Delta Chat now and choose Add as second device or import a backup.] I got that on the new version that was just pushed out to Android on a normal PGP (not Autocrypt) email. The older messages in the name thread have gotten through just fine and my other MUA can decrypt the new one becaus…