System and method of creating and sending broadcast and multicast data

摘要

A method of encrypting broadcast and multicast data communicated between two or more parties, each party having knowledge of a shared key, is provided. The key is calculated using values, some of which are communicated between the parties, so that the shared key is not itself transferred. Avoiding the transfer of the key offers several advantages over existing encryption methods.

主权项

1. A device comprising:
at least one memory configured to store instructions and data; and at least one processor configured to access the at least one memory and execute the instructions, causing the at least one processor to:
generate an Internet Group Management Protocol (IGMP) query;encrypt the IGMP query to create a first cyphertext;transmit, to a lock device having access to a shared base session key, the first cyphertext, wherein the lock device is configured to decrypt the first ciphertext to yield the IGMP query and generate a multicast offset value;receive, from the lock device, encrypted data including the multicast offset value; and;calculate a multicast base session key as a function of the shared base session key and the multicast offset value.