| 摘要 |
The present invention relates to a lightweight anti-denial system using transaction certification and a method thereof, and more specifically, a lightweight anti-denial system using transaction certification comprising: a user terminal which preregisters a proxy signature key (dp_i) to a proxy anti-denial server; a service providing server which request an anti-denial token when an electronic transaction request is received from the user terminal, and the performs certification when the anti-denial token is received to permit a transaction by the user terminal; and the proxy anti-denial server which stores the proxy signature key (dp_i) of the user, manipulates anti-denial token information including transaction time and transaction information, when the anti-denial token is requested from the user, by using the proxy signature key (dp_i) of the user to generate and store the anti-denial token (NRT(dp_i,z)), and transmits the anti-denial token (NRT(dp_i,z)) to the user terminal, and a method thereof are provided. After the user registers the proxy signature key to the proxy anti-denial server, an anti-denial service can be provided only when the transaction is certified at all times and places, which is proper for mobile and cloud environments. The user is allowed to frequently manage and verify the anti-denial information for transaction events through the proxy anti-denial server, thereby guaranteeing reliability of the electronic transaction. |
