US Patent 9954837 Method of multi-factor authenication during encrypted communications

Embodiments herein provide, for example, method, comprising: requesting, by a first user on a first device, to open a channel of communication to a second user on a second device; confirming the first user's identity and the second user's identity through a second channel that is separate from the communication channel; and communicating through the communication channel after each user has validated the other party's identification through the second channel.