SECURE MESSAGING WITH READ-UNDENIABILITY AND DELETION-VERIFIABILITY

摘要

A cryptographically-secure component is used to provide read-undeniability and deletion-verifiability for messaging applications. When a messaging application of a sending node desires to send a message to a messaging application of a receiving node, the sending node requests an encryption key from the receiving node. The cryptographically-secure component of the receiving node generates an encryption key that is bound to a state of the receiving node. The messaging application of the sending node encrypts the message using the encryption key and sends the encrypted message to the messaging application of the receiving node. Because the encryption key used to encrypt the message is bound to the state associated with reading the message by the cryptographically-secure component, if the receiving node desires to decrypt and read the encrypted message, the receiving node may advance its state to the bound state to retrieve the decryption key.