A METHOD OF PROCESSING TRANSACTION INFORMATION FOR PREVENTING RE-USE OF TRANSACTION INFORMATION BASED ON A SHARED ENCRYPTION KEY AN APPRATUS THEREOF

摘要

A method for processing card information using a card reader module includes a step of receiving part of card information from a card reader module; a step of Identifying an approval target financial server using part of data in a terminal; a step of allowing the card reader module to request first payment information encryption data corresponding to the approval target financial server; and a step of outputting the first payment information encrypted data by encrypting the first payment information based on the card information with a first encryption key corresponding to the approval target financial server in the card reader module. The reuse of the first payment information encryption data is prevented so as to be uniquely decrypted only by the first financial server that receives the payment information encryption data. It is possible to improve system reliability.