Financial information input method using symmetrical key security algorithm and commercial transaction system for mobile communications

Abstract

A financial information input method using a symmetric key security algorithm and a mobile communications commercial transaction system using the same encrypts financial information such as a customer's identification number and a valid date with a symmetric key algorithm by use of an electronic wallet administration number of a customer's terminal used as an encryption key at the time of applying an issuance of a card, and directly inputs the encrypted financial information into a customer's electronic wallet terminal or inputs the same via a communications network. In the case that a commercial transaction settlement is accomplished with a mobile communications terminal in which the encrypted financial information is stored, his or her own electronic wallet administration number is input so that the encrypted financial information and the administration number are optically transmitted to a POS terminal / card inquiry machine of an affiliated shop. The POS terminal / card inquiry machine which has received the encrypted financial information and administration number uses the received electronic wallet administration number and decodes the encrypted financial information with the administration number. Thus, although an unauthorized person knows an encryption algorithm unless a customer's electronic wallet administration number is exposed illegally, customer's financial information cannot be used. That is, an effect of fundamentally preventing customer's financial information from being illegally copied can be provided.

Description

technical field [0001] The present invention relates to a commercial transaction system using a personal portable mobile communication terminal attached with an optical transceiver, and more particularly, the present invention relates to a method for inputting financial information using a symmetric key security algorithm in which security is secured by a symmetric key The algorithm encrypts the financial information so that the financial information cannot be illegally copied, and then the encrypted financial information is installed in the mobile communication terminal, so that various transaction fees can be settled through the mobile communication terminal. Background technique [0002] In recent years, cards that are more convenient to use and easier to carry than cash have been widely used. Cards can be classified into credit cards, cash cards, direct payment cards, advance payment cards, traffic cards and the like according to settlement methods. Currently used cards...

AI Technical Summary

Problems solved by technology

However, even in this case, the private key is established in the terminal, making it very difficult to protect the key

Also, since PKI requires a lot of computing time, this technology may not be easily applicable to small terminals

However, if PKI is applied to small terminals, a large amount of computing time will also cause inconvenience to users

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