Technology of key escrow in electronic commerce

With the rapid development of Internet electronic commerce has been noticed increasingly. However, the problem of its security makes people not dare into this advanced field. The subjects involving in electronic commerce activities need to prevent the other subjects from denying their activities. Some security organizations of government also need to get the encrypted key through legal means in order to track, intercept and capture criminal information. Thus the encrypted key escrow technology must be adopted and it must be of security. For the 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 work together. For designing an effective and safe key escrow, the discrete logarithm is applied for solving key escrow. The security of this algorithm completely depends on the difficulty to solve discrete logarithm, therefore, this algorithm is secure and simple when a big prime number is adopted. Moreover, adding this technology in SET will benefit the legal agency to monitor illegal activities.