The information interaction between operation anomalies and treatments is usually completed by operators to ensure the stable operation of distribution networks， but it is vulnerable to the subjectivity of operators， resulting in the mismatch between treatments and operation anomalies， and the lack of guarantee of information security for the interaction process. Therefore， a blockchain-based network model for distribution network exception management， Exception Management Blockchain Network （EMBN）， was proposed， as well as an improved three-line defense model for distribution network. Firstly， according to the tamper-proof and traceable characteristics of blockchain， an Anomaly Index Blockchain （AIB） was constructed， and appropriate treatments were found to solve operation anomalies based on the latest information in the block. Secondly， an Exception Interact Blockchain （EIB） was constructed to monitor the interaction process of operation anomalies and treatments， and ensure the implementation of treatments. Finally， the EMBN was applied to the three-lines of defense in traditional distribution network， and the intelligent contract was combined to realize adaptive detection and anomaly response of the distribution network. Simulation results show that， facing the complicated distribution network environment， EMBN can match treatments and operation anomalies without the influence by subjectivity of operators； compared with the traditional distribution network， EMBN has the advantage in the information security of information interaction.

To enhance the integrity and security of cloud data storage， a data storage scheme based on hybrid algorithm blockchain and a decentralized framework integrating identity authentication and privacy protection were proposed in Wireless Sensor Network （WSN）. Firstly， the collected information was transmitted to the base station by the cluster heads， and all the key parameters were recorded on the distributed blockchain and transmitted to the cloud storage by the base station. Then， in order to obtain a higher security level， the 160-bit key of Elliptic Curve Cryptography （ECC） and the 128-bit key of Advanced Encryption Standard （AES） were combined， and the key pairs were exchanged between the cloud storage layers. The proposed blockchain is based on a hybrid algorithm and combined with an identity verification scheme， which can well ensure the secure storage of cloud data， thus achieving excellent security. In addition， malicious nodes were able to be directly removed from the blockchain and also their authentication was able to be revoked through the base stations. And this operation is convenient and fast. Simulation results show that compared with schemes of decentralized Blockchain Information Management （BIM） scheme， secure localization algorithm based on trust and Decentralized Blockchain Evaluation （DBE） and Key Derivation Encryption and Data Analysis （KDE-DA） management scheme， the proposed scheme has some advantages in delay， throughput and computational overhead.