本文介紹了公開密碼加密體制、單向散列函數(shù)、認(rèn)證機構(gòu)和公鑰管理等。并在此基礎(chǔ)上，詳細(xì)探討了明文不需要保密的一般數(shù)字簽名實現(xiàn)算法、明文需要保密的數(shù)字簽名實現(xiàn)算法；提出了發(fā)送方和接收方均不可抵賴的帶加密數(shù)字簽名實現(xiàn)算法。這些算法具有安全、快捷等特點，適合于不同應(yīng)用場合的網(wǎng)絡(luò)數(shù)據(jù)通信。
關(guān)鍵詞：公鑰體制；CA 認(rèn)證；數(shù)字簽名;應(yīng)用研究
Abstract: Public key system, single direction Hash function, certificate authority organization and public key management are introduced. On this base, general digital signature which document does not need to be kept secrecy, and encrypting digital signature which document needs to be kept secrecy are discussed. Undeniable encrypting digital signature is presented. These signature technologies have the advantages of safety and speediness，they are suitable for internet data communication in different areas.
Key words: Public key system; Certificate authority; Digital signature；Application Research