The invention relates to the technical field of industrial
wireless networks, in particular to an industrial
wireless network security communication method based on a national cryptographic
algorithm, which comprises the following steps that: identity
authentication is required before equipment accesses the network, and gateway equipment and field equipment finish bidirectional identity
authentication through the national cryptographic
algorithm SM2. The
secure communication method provided by the invention comprises three stages of identity
authentication, key negotiation and data
encryption and decryption, identity authentication is carried out by adopting a national cryptographic
algorithm SM2, and transmitted data is encrypted and
data integrity is verified by adopting a hash-based
message authentication code SM3 (HMAC-SM3) and an SM4
block cipher algorithm (SM4). According to the
secure communication method, how to save the storage space and the communication overhead of a WIA-FA network is considered, and meanwhile, a set of
secure transmission protocol which is autonomously controllable on the industrial
wireless network standard and the cryptographic algorithm is realized, so that the security, the reliability and the
controllability in the
industrial communication process are fundamentally guaranteed.