Multisig account - encrypted message

[cryptoBeliever]

Problem: At this moment multi-sig account is not supporting encrypted messages. The transaction is started from the cosigner side and to encrypt a message wallet is using the sender's private key. Cosigners don't know multisig account private key. That's why we don't have a function to encrypt/decrypt messages for multi-sig accounts.

The question is if we can think about a solution that will allow sending encrypted messages for multisig?