
A prepaid card is disclosed, which uses drawing codes not requiring so high accuracy and permits direct computer processing of read-out data without agency of any A/D converter, thus permitting system security improvement. In the prepaid card 1, main information 2, personal information 3, fingerprint image 4 and security data rotation key 5 are printed on the surface as a transparent print pattern with box drawing codes provided in the form of four tetrahedrons of different sizes arranged one in...











