| 摘要 |
A method for transferring a purchase key among electronic cash companies with a public key certificate is provided to transfer an electronic cash purchase key by using an asymmetrical key encryption algorithm based on the public key certificate. A public certificate authority generates a private and a public key for the asymmetrical encryption algorithm. The electronic cash company generates a pair of the private and public key for the asymmetrical encryption algorithm, and requests the public certificate authority to issue the public key certificate for the electronic cash company. A secure application module smart card generates the pair of the private and public key, and requests the electronic cash company to issue the public key certificate for a secure application module. The electronic cash company loads the public key certificate for an electronic cash company public key and the certificate for a secure application module public key when the secure application module is issued. |
