[iidqkmqv] Wrong public key

One of the potential catastrophic failures of encrypted communications, e.g., public-key cryptography for email, is that the user might accidentally select the wrong key and wrong recipient to encrypt to.  This results in the wrong recipient being able to read the message, a rare but potentially very costly error.  Avoiding this error is a UI challenge:

Repeat the name of the recipient (say) at the beginning of every line.

Quote the previous conversation.  This might be tricky if previous conversations had been encrypted.

Some sort of natural language processing AI which knows the context of the previous conversation (once again, tricky if it had been encrypted) and flags if it senses the current message does not follow from or seems out of place compared to previous interaction.