Secure messaging

Approaches are described for securely sending, receiving, or otherwise processing communications between electronic devices. A communication can be received at a computing device (such as a mobile phone). The communication can include information captured about a person initiating the communication such as an image of the user, voice data of the user, typing pattern information of the user, or any other information that can be used to identify the user generating the communication. The information can be compared against profile data (e.g., contact information such as a phone number or name of the sender) associated with or otherwise stored for an indicated sender of the communication to generate a confidence value, where the confidence value can be used to indicate that the person initiating the communication is the indicated sender.