US Patent 10020940 Identity-based encryption for securing access to stored messages

A method, system, and computer program product for securing access to stored messages using identity-base encryption are disclosed. The method includes generating a master private key and generating a corresponding master public key. The master private key and the master public key are both generated at a messaging client. The method also includes transmitting the master private key from the messaging client to a messaging server. The transmittal of the master private key to the messaging server is performed without transmitting the master private key.