FINANCE SYSTEM AND FINANCIAL TRANSACTION DATA TRANSMISSION METHOD AND DATA DECRYPTION SYSTEM AND METHOD FOR SECURELY DELIVERING OF FINANCIAL TRANSACTION INFORMATION

摘要

PURPOSE: A financial system for safely transmitting financial transaction information, a financial transaction data transmitting method, a data decoding system, and a method thereof are provided to safely transmit data related to a financial transaction by using a public key, a private key, shared encoding/authenticating symmetry keys, and a multidimensional code of a user. CONSTITUTION: An encoding unit(212) encodes data and generates encoded data by using an encoding symmetry key which is previously shared with a portable device. The encoding unit generates a data authentication code about the data by using an authenticating symmetry key which is previously shared with the portable device. The encoding unit generates an encoded data authentication code. A multidimensional code generating unit(213) generates a multidimensional code including the encoded data, the data authentication code or the encoded data authentication code. A multidimensional code providing unit(214) provides the generated multidimensional code to a user. [Reference numerals] (211) Public key receiving unit; (212) Encoding unit; (213) Multidimensional code generating unit; (214) Multidimensional code providing unit; (221) Multidimensional code recognizing unit; (222) Data extracting unit; (223) Decoding unit