| 摘要 |
PURPOSE: An electronic certificate-based security service providing method and a system thereof are provided to develop and supply various security services by decoding encoded data with only a private key regardless of the update/disposal of an electronic certificate. CONSTITUTION: A user(20) has a computer and a mobile phone and an online service main agent(30) provides an e-mail service for the user. An S/G(Security Gateway)(10) user registration information including an email account, a certificate file, and a mobile phone number and a key file of a disposed certificate. The S/G provides the certificate file of a receiver so that the user generates and transmits a security mail. The S/G provides a key file list of the disposed certificate for the user to open the received security mail. [Reference numerals] (11) Security service server; (20) User(of a security service); (21) Computer; (22) Mobile phone; (30) (Online)service agent; (S101) Applying for a security service; (S102) Registering an email account, a certificate file(public key), and a mobile phone number; (S103) Storing an electronic certificate(personal key, public key)
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