Authorizable threshold signature method for power internet of things

The invention provides an authorizable threshold signature method for an electric power internet of things. The method comprises the following steps: adopting exponential operation and bilinear mapping in a multiplication cyclic group as main operation; a (t, n) threshold value is set, so that a plurality of signers dispersedly hold signature keys, and the security risk caused by key leakage is reduced; controllability and forward security of authorization of a data owner to a signer are realized by using a mode of updating a signature private key in different time periods; a verifier can judge the authenticity of the signature and the integrity of the data. 本发明提出一种面向电力物联网的可授权的阈值签名方法，采用乘法循环群中指数运算和双线性映射作为主要运算；设立(t,n)阈值使多个签名者分散持有签名密钥，降低密钥泄露带来的安全风险；利用分时段更新签名私钥的方式实现数据拥有者对签名者授权的可控性和前向安全性；验证者可以判断签名的真实性和数据的完整性。