Patent ID: 9215218
Filing Date: 2015-12-15
Classification: H04L

Abstract:
1. A method for secure workgroup communication, the method comprising: generating a workgroup key update message for a workgroup, wherein the workgroup key update message includes a workgroup key and a time to live (TTL) value for the workgroup key, and wherein the workgroup includes a plurality of parent nodes and child nodes, each of the child nodes being associated with one or more of the parent nodes; encrypting the workgroup key update message using a plurality of public keys associated with the plurality of parent nodes to obtain a plurality of encrypted workgroup key update messages, wherein each of the encrypted workgroup key update messages has been encrypted with a respective one of the plurality of public keys; and broadcasting the encrypted workgroup key update messages and an identification of the parent nodes to the workgroup, wherein the identification is usable by the plurality of child nodes to decrypt the encrypted workgroup key update messages.