US Patent 9172533 Method and system for securing communication

A method for securing communication between members. The method includes a first member obtaining a secret. An n-bit generator executing on the first member generates a message digest using the first secret. The first member extracts algorithm selector bits and an encryption key from the message digest, and selects an encryption algorithm identified by the algorithm selector bits. The method further includes the first member encrypting a communication using the encryption algorithm and the encryption key to obtain an encrypted communication, and the first member sending, to a second member of the group, the first encrypted communication.