| 摘要 |
PROBLEM TO BE SOLVED: To efficiently improve security in a card security system using an identification card or the like. SOLUTION: In a card security system equipped with a card issuing device 100 and a card reading device 300, the card issuing device 100 reads a hologram 2 and a bar code 3 on a card 1, and obtains data D and E. Also, data A, B, and C are inputted from a computer 200 to the card issuing device 100. An enciphering part 104 generates check data EN based on the data A-E, and a magnetic writer 103 writes the data A-C and EN in a magnetic stripe 4. The card reading device 300 reads the data A-E from the card 1, calculates check data by using this, and compares the check data with the check data EN recorded in the magnetic strip 4 for judging the authenticity of the card. |
