数字签名技术在互联网安全中的作用解析.doc

公选课论文 学生姓名： xxxxxxx 学 号： xxxxxxxxxxxxx 所在系部： 电气信息系 专业班级： 软件一班 日 期： 二○一二年五月 数字签名技术在互联网安全中的作用 摘要 数字签名是个加密的过程，数字签名验证是个解密的过程。 （4号宋体） Abstract Network communication to promote and accelerate the development of social informatization, the information security in network environment is not optimistic, the information in the transmission process security issues, information may be stolen and modify, brought trouble. It is in this context, the digital signature technology will emerge as the times require. Digital signature ( Digital Signature ) technology is a typical application of asymmetric encryption algorithm; the sender of data with its private key to encrypt the data processing, the data of the legitimate signature, the data receiver is to use each others public key to interpret received a digital signature, and interpretation of results for data integrity verification, in order to confirm the validity of the signature. The essence of digital signature is an encryption process, digital signature verification is a decryption process. With the development of science and technology, the ordinary digital signature has been unable to meet the demand of the society. Come one after another one to put forward a new scheme of digital signature and digital signature, use special ways. This paper will briefly introduce the digital signature technology development, function and Realization principle. Keywords： Digital signature Encryption algorithm Data integrity Public and private key 1 引言 所谓数字签名就是通过某种密码运算生成一系列符号及代码组成电子密码进行签名，来代替书写签名或印章，对于这种电子式的签名还可进行技术验证，其验证的准确度是一般手工签名和图章的验证而无法比拟的。数字签名是目前电子商务、电子政务中应用最普遍、技术最成熟的、可操作性最强的一种电子签名方法。它采用了规范化的程序和科学化的方法，用于鉴定签名人的身份以及对一项电子数据内容的认可。它还能验证出文件的原文在传输过程中有无变动，确保传输电子文件的完整性、真实性和不可抵赖性。数字签名在ISO7498-2标准中定义为：附加在数据单元上的一些数据，或是对数据单元所作的密码变换，这种数据和变换允许数据单元的接收者用以确认数据单元来源和数据单元的完整性，并保护数据，防止被人（例如接收者）进行伪造。美国电子签名标准（DSS，FIPS186-2）对数字签名作了如下解释：利用一套规则和一个参数对数据计算所得的结果，用此结果能够确认签名者的身份和数据的完整性。按上述定义PKI（Public Key Infrastructino 公钥基础设施）提供