CAJ | 학술논문

电子商务随着Internet的迅速发展，日益受到人们的关注。但其安全问题经常令人不敢涉足其中。一方面参加商务活动的主体需防止另一方抵赖活动，另一方面政府安全机构为跟踪截获犯罪嫌疑人员的通信，都需要通过合法渠道获得电子商务中商务活动的主体进行数据通讯时的加密密钥。此时需采用密钥托管技术，而且密钥托管必须是安全的。为了安全起见，密钥被分成几块，分别存在几位可信赖的委托人处进行托管，任何一位委托人都不能单独恢复密钥。只有几位委托人在一起才能回复密钥。为了有效安全的进行密钥托管，采用了离散对数解决密钥托管。鉴于本算法的安全性依赖与求离散对数的困难性，所以当选用很大的安全素数时，此算法既简单又安全。并在SET中加入了此密钥托管技术，有利于监听非法的活动。
전자상무수착Internet적신속발전，일익수도인문적관주。단기안전문제경상령인불감섭족기중。일방면삼가상무활동적주체수방지령일방저뢰활동，령일방면정부안전궤구위근종절획범죄혐의인원적통신，도수요통과합법거도획득전자상무중상무활동적주체진행수거통신시적가밀밀약。차시수채용밀약탁관기술，이차밀약탁관필수시안전적。위료안전기견，밀약피분성궤괴，분별존재궤위가신뢰적위탁인처진행탁관，임하일위위탁인도불능단독회복밀약。지유궤위위탁인재일기재능회복밀약。위료유효안전적진행밀약탁관，채용료리산대수해결밀약탁관。감우본산법적안전성의뢰여구리산대수적곤난성，소이당선용흔대적안전소수시，차산법기간단우안전。병재SET중가입료차밀약탁관기술，유리우감은비법적활동。
With the rapid development of Internet electr onic commerce has been n oticed increasingly. However, the problem of its security makes people not dare into this advanced field. The subjects involving in electronic commerce activiti es need to prevent the other subjects from denying their activities. Some securi ty organizations of government also need to get the encrypted key through legal means in order to track, intercept and capture criminal information. Thus the en crypted key escrow technology must be adopted and it must be of security. For th e sake of security the key will be divided into several blocks which are stored in different reliable agents. The key can not be restored unless all agents w ork together. For designing an effective and safe key escrow, the discrete logar ithm is applied for solving key escrow .The security of this algorithm completel y depends on the difficulty to solve discrete logarithm ,therefore, this algorit hm is secure and simple when a big prime number is adopted.Moreover, adding thi s technology in SET will benefit the legal agency to monitor illegal activitie s.