A digital signature based on public key algorithms is illustrated,which can be regarded as an identification card in cyberspace and can properly solve the signature problem of sensitive documents in power system .

• 采用基于公钥密码算法的数字签名可以充当个人在网络空间“身份证”的角色 ,能够很好地解决目前 MIS存在的敏感文档签名问题。