I think you want Alice to retrieve Bob's public key, but it also sounds like you want Autocrypt [0] and/or RFC-7929 [1]. [0] https://autocrypt.org/ https://aut

I think you want Alice to retrieve Bob's public key, but it also sounds like you want Autocrypt [0] and/or RFC-7929 [1]. [0] https://autocrypt.org/ https://autocrypt.org/ [1] https://tools.ietf.org/html/rfc7929 https://tools.ietf.org/html/rfc7929