ADVANCED METERING INFRASTRUCTURE NETWORK SYSTEM AND MESSAGE BROADCASTING METHOD

摘要

An advanced metering infrastructure (AMI) server, an AMI network node, an AMI network system and a message broadcasting method thereof are provided. The AMI server generates a broadcasting key from a broadcasting message through a hash function, encrypts the broadcasting message into an encrypted broadcasting message via the broadcasting key, encrypts the broadcasting key into an encrypted key via a symmetric key, and transmits the encrypted broadcasting message and the encrypted key to the AMI network node. The AMI network node decrypts the encrypted key into the broadcasting key via the symmetric key, decrypts the encrypted broadcasting message into the broadcasting message via the broadcasting key, and processes the broadcasting message after determining that the broadcasting message corresponds to the broadcasting key through the hash function.

主权项

1. A message broadcasting method for an advanced metering infrastructure (AMI) server, the AMI server being used in an AMI network system which further comprises an AMI network node, the message broadcasting method comprising the following steps of:
(a) enabling the AMI server to generate a broadcasting key from a broadcasting message according to a hash function; (b) enabling the AMI server to encrypt the broadcasting message into an encrypted broadcasting message through use of the broadcasting key; (c) enabling the AMI server to encrypt the broadcasting key into an encrypted key message through use of a symmetric key corresponding to the AMI network node; and (d) enabling the AMI server to broadcast the encrypted broadcasting message and the encrypted key message so that the AMI network node decrypts the encrypted key message into the broadcasting key through use of the symmetric key, decrypts the encrypted broadcasting message into the broadcasting message through use of the broadcasting key, and processes the broadcasting message after determining that the broadcasting message corresponds to the broadcasting key according to the hash function.