Patent ID: 9043876
Filing Date: 2015-05-26
Classification: H04L

Abstract:
1. A method, comprising: generating a packet containing a Source Address contained in a header and a protection level, key identifier information, and frame counter contained in the security information portion of the packet; obtaining a key related to said key identifier information and a message data m; obtaining a nonce data N comprising said Source Address, frame counter, and protection level, wherein a value M encoded in the protection level indicates a length of an authentication tag, wherein the protection level inhibits or invokes data confidentiality, and wherein the protection level inhibits or invokes data authenticity; and generating, by a block-cipher, an output c based on said key, the message data m, and the nonce data N, wherein the output comprises the authentication tag if the protection level invokes data authenticity, and wherein the output comprises encrypted data if the protection level invokes data confidentiality.