The invention relates to a
network security protection method and
system based on a block chain, and aims to solve a series of challenges of identity
authentication single-point failure, insufficient static block chain fragmentation,
threat detection limitation,
encryption algorithm security problem and the like in the existing
network security protection technology. According to the method, an on-chain
digital identity is generated by fusing an equipment
unique identifier and user biological characteristics, dynamic authority management is performed based on the identity, network traffic is detected in real time by using a
deep learning model of adversarial training, a
threat detection result is generated, an authority level is updated according to the detection result through an intelligent contract, and meanwhile, the user experience is improved. A fragmented block
chain network technology is adopted, the number of sub-chains is dynamically adjusted according to a network load, cross-chain
threat intelligence synchronization is realized through a
relay chain, in addition, a threshold signature and zero-knowledge proof technology is also adopted, permission change records and cross-chain data are encrypted and verified, the security and privacy of the data are ensured, and the security and privacy of the data are improved. According to the invention, the efficiency and reliability of
network security protection can be effectively improved, and a
safer and more reliable network environment is provided for users.