Patent ES-8602275-A1 (ES)
Title: Method and apparatus for veryfying personal identification numbers and checking stored number series in identification media.
IPC: G07F7/10
Filed: 1984-11-16
Abstract: Each medium contains information readable by a machine in the form of a card or account number or permanent information in the form of a permanently inscribed number (FN). The read card or account number is encrypted with an algorithm defined by a first key which is formed by a relation between the personal identification number (PIN) and a first key member. - A personal clock number (PCN) is encrypted with an algorithm defined by a second key and the coded card or account number is compared with the coded PCN. The second key is formed by a relation between the FN and a second key number. Pref. the PCN is generated by the card and account number. (1/4) EPAB- EP-143096 B Each medium contains information readable by a machine in the form of a card or account number or permanent information in the form of a permanently inscribed number (FN). The read card or account number is encrypted with an algorithm defined by a first key which is formed by a relation between the personal identification number (PIN) and a first key member. - A personal clock number (PCN) is encrypted with an algorithm defined by a second key and the coded card or account number is compared with the coded PCN. The second key is formed by a relation between the FN and a second key number. Pref. the PCN is generated by the card and account number. (14pp Dwg.No.1/4) - EP-143096 B A method for verifying a personal identification number (PIN) and checking a number series put onto an identification medium, containing machine readable information in the form of a card or account (PAN) and apermanent information in the form of a permanent number (FN), said method comprising encryption of the read card or account number (PAN) with an algorithm defined by a first key, said first key being formed by a relation between the personal identification number (PIN) and a first key number (K1), encrypting a personal check number (PCN) read from the card, and formed at the cardgeneration by encrypting the card or account number (PAN) with the algorithm defined by said first key followed by decrypting the result with an algorithm defined by a second key forming the personal check number, with an algorithm defined by said second key and comparing the card or account number (PAN) encrypted as described with the encrypted personal control number (PCN) characterized in that the second key is formed by a relation between the permanent number (FN) and a second key number (K2). (9pp) USAB- US4629872 A A method of verifying a personal identification number (PIN) and checking a number series put onto an identification medium, containing information readable by machine in the form of a card and account number (PAN) and permanent information in the form of a permanently inscribed number (FN). Encryption of the read card or account number if performed with an algorithm defined by a key. The key being formed by a relation between the personal identification number (PIN) and key number. Encryption of a personal check number (PCN) is with an algorithm defined by a second key. - Comparison of the coded card or account number with the coded personal check number (PCN) is characterised in that the second key is formed by a relation between the permanent number (FN) and a second key number (K2).