国密SM2中k值选取的研究与改进

Research and Improvement of k Value Selection in SM2

区块链技术中的安全问题一部分取决于移动设备的能源算例和应用情况,这决定了设备会具有安全隐患,特别是智能卡等嵌入系统,它们特定应用情况下是无法支持随机源的,解决随机源选取问题从而加强密钥对的安全性是非常重要的。随着我国自主提出的公钥密码算法SM2的地位不断提高,该算法应用到设备和系统中是必然趋势,通过HMAC算法改进SM2签名生成中随机值k的选取方式,最终使SM2转换为确定性方案,提高嵌入式系统中随机源的质量,增加算法安全性,使之普遍适用。

Part of the security problems in blockchain technology depend on the energy calculation examples and applications of mo⁃bile devices,which determines that devices will have security risks,especially embedded systems such as smart cards,which can not support random sources in specific applications.It is very important to solve the problem of random source selection so as to en⁃hance the security of key pair.With the improvement of the status of public key cryptography algorithm SM2,which is proposed by our country,it is an inevitable trend to apply this algorithm to devices and systems.Through HMAC algorithm,we can improve the selection of random value K in SM2 signature generation,and finally transform SM2 into a deterministic scheme,improve the quali⁃ty of random sources in embedded systems,increase the security of the algorithm,and make it universally applicable.