CONFIDENTIAL MESSAGE EXCHANGE USING BENIGN, CONTEXT-AWARE COVER MESSAGE GENERATION

摘要

Systems and methods are disclosed permitting a sender to send a secret and secure message to a recipient. An application on a sender device interfaces with known message generating tools to permit a user to generate a message. The local application encrypts the message (and optional attachments) based on public/private key pairing negotiated with the server given the recipient device id. The sender device transmits the cipher text to the server. The server generates a benign, text-based, context-appropriate message and delivers same to a recipient device by way of a known messaging service. The benign message provides a secret clue to the recipient that an encrypted message is available. Recipient may then access and decrypt the encrypted message, such as from the server in response to a successful challenge (e.g., password request).

主权项

1. A system providing secret and secure electronic messaging delivery, comprising:
a message device comprising a recipient address key table and a recipient address context data table; a sending device communicatively coupled to said message device, said sending device comprising:
a message application configured to:
receive user input identifying a message;receive user input specifying a recipient address for said message; andretrieve from said recipient address key table an encryption key corresponding to said recipient address; an encryption engine configured to encrypt said message using said encryption key associated with said recipient address; and an interface to deliver said encrypted message associated with said recipient address to said message device;said message device configured to:
use said recipient address specified by said messaging application and context data from said recipient address context data table associated with said recipient address to generate a benign, contextually appropriate message, said benign, contextually appropriate message devoid of explicit reference to said encrypted message and indicative of availability of said encrypted message; and initiate delivery of said benign, contextually appropriate message to said recipient address as an indicator of availability of said encrypted message.