基于区块链的畜牧养殖资产监管身份认证研究

针对畜牧养殖资产监管系统数据采集源头设备不可信，牲畜个体身份标识识别复杂，养殖敏感数据机密性差等问题，提出一种基于区块链技术和聚合签名算法的畜牧资产身份认证方案，实现资产监管系统中数据采集源头、数据存证展示的全流程真实可信，以及监管系统各节点、各物联网设备间身份验证的可信可溯，有效保障了畜牧资产监管系统从区块链网络到节点及物联网设备间细粒度的身份验证。在此基础上对方案进行混淆性分析和通信数据量分析，结果表明，加密过程的扩散性测试密文改变率平均为93.61%，相关性测试密文改变率平均为93.28%，具有较高的混淆性，并将通信量由线性级降低为常量级，验签耗时平均节省40.01%，有效降低数据传输通信量和系统验证开销，具有高效的批量身份验证性能，满足畜牧资产监管过程中设备身份认证需求。

Identification of Animal Husbandry Assets Supervision Based on Blockchain

In order to solve the problems of distrust source of animal husbandry supervision data, complicated identification of livestock, and poor confidentiality of sensitive breeding data, an identity authentication scheme based on blockchain technology and aggregated signature algorithm was proposed to ensure the authenticity of the data source and the transmission safety. The identity authentication trust between blockchain nodes and sensing devices was realized, and the fine-grained identity examination from the blockchain network to the nodes and downstream access devices was guaranteed, so as to complete the traceability of identity of access devices on and off the chain of blockchain system. This scheme can complete the identity verification of the equipment and solve the problems of complex individual identification of equipment and difficulty in the asset supervision. The security of the authentication scheme was analyzed. The results showed that the average change rate of the diffusion test ciphertext was 93.61%, and the average change rate of the correlation test ciphertext was 93.28%. In addition, the scheme had efficient batch authentication performance. By dynamically aggregating and forwarding the signature data, the traffic was reduced from linear level to constant level, and the signature verification time was saved by 40.01% on average. It can effectively reduce the data transmission traffic and system verification overhead, and meet the needs of equipment authentication in the process of animal husbandry supervision.