| 摘要 |
The present invention relates to security for online transactions, and more particularly, to a security method and system for online transactions using a communication terminal in which personal information is input by using the communication terminal of a user as an input means replacing a computer keyboard so as to greatly prevent fraud caused by direct input on a computer keyboard or memory hacking. The security method of the present invention for performing online transactions by using a computer terminal connected to an online transaction server for providing an online transaction service through a communication network, includes a step of taking, as an input, personal transaction information through the communication terminal additionally connected to the computer terminal such that a phone pad program installed in the communication terminal is driven and personal transaction information is ready to be input in accordance with the request for transaction information from the online transaction server; and a step of enabling a user to input specific items via the phone pad program, encrypting input transaction information and transmitting the encrypted information to the online transaction server through the computer terminal. The present invention prevents information leakage which might be caused by a computer terminal which has been hacked already since the system of the present invention allows users to input and transmit important personal information through the use of a personal communication terminal even in a public place.
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