Read and analysis for the advanced research papers: fast exponentiation computation, multisignature, proxy signature, threshold signature, group signature, identification authentications, visitor control, Multisecret sharing. 阅读并讨论专题论文:快速指数运算、多重签名、代理签名、门限签名、群签名、身份认证、访问控制、(多)秘密共享。