近年來，安全電子商務(wù)協(xié)議的設(shè)計(jì)和分析逐漸成為熱點(diǎn)。機(jī)密性、公平性等性質(zhì)是衡
量電子商務(wù)協(xié)議安全與否的重要標(biāo)志，也是協(xié)議能否順利使用的重要前提。機(jī)密性和公平性是安全電子商務(wù)協(xié)議的基本性質(zhì)，但可證實(shí)電子郵件協(xié)議CMP 作為電子商務(wù)協(xié)議的一種卻并不滿足這些性質(zhì)。該文指出可證實(shí)電子郵件協(xié)議CMP 的幾個(gè)缺陷，對(duì)其分析并提出了改進(jìn)方案，改進(jìn)后的協(xié)議滿足了機(jī)密性和公平性。
關(guān)鍵詞：安全電子商務(wù)協(xié)議；機(jī)密性；公平性；可證實(shí)電子郵件協(xié)議
Limitations and improvement of CMP XI Lin, ZHAO Dong-Ming (School of Information & Engineering, Zhengzhou University, Zhengzhou Henan 450052, China) Abstract: There is a growing interest in the design and analysis of electronic commerce protocols. Both confidentiality and fairness are important in electronic commerce protocols，but Certified
electronic mail protocol (CMP), as a kind of electronic commerce protocol, does not have such
crucial qualities. So several limitations of the CMP are pointed out and the improved measure is put forward. The improved one satisfies both confidentiality and fairness.
Key words: electronic commerce protocol; confidentiality; fairness; Certified electronic mail
protocol