Card Knowledge Introduction ----------------------------------------------------------------------------- ISO7811-1 to ISO7811-6, ISO7812, ISO7813, and ISO15457, etc. Among them: ISO7810 standard: The physical characteristics of the magnetic card are formulated; ISO7812 standard: formulated the recording technical standard for magnetic cards; ISO781-4 standard: Developed the recording technical standards for only Track1 and Track2 on the magnetic card; ISO781-5 standard: formulated TRACK3 record technical standards on magnetic cards; ISO15457 standard: Magnetic card physical standard / test mode Track standard F / 2F technical standard; magnetic card physical structure and data structure generally, magnetic card applied to banking system The magnetic tape has 3 tracks, which are TRACK1, TRACK2 and TRACK3, respectively. Each Track records different information, which has different applications. In addition, there are some magnetic cards for application systems only use two tracks (TRACK), and even only one trackk. In the application system we designed, all three TRACK or two or one track can be used depending on the specific situation. As shown above, it is a physical dimension definition of magnetic cards that conform to ANSI and ISO / IEC standards. The definition of these dimensions involves the standardization of magnetic card reading and writing. Because if you perform data encoding on the magnetic card on the magnetic card, its data is high or low, and even a few millimeters, the encoded data information is offset to another TRACK. I got it. Where: TRACK1, 2, 3 is the same, about 2.80 mm (0.11 inches), for storing the user's data information; adjacent two TRACKs about 0.05 mm (0.02 inches) gap (GAP) Used to distinguish between adjacent tracks; the entire tape width is about 10.29 mm (0.405) (if it is a magnetic card application of 3 TRACK), or at 6.35 mm (0.25 inches) (if it is 2 TRACK) Magnetic card). In fact, the magnetic tape width on the bank magnetic card we have in contact is widen to 1 to 2 mm, and the total width of the tape is between 12 to 13 mm. On the tape, the starting data position and the end data position of the three valid track data are not in the edge of the tape, but in the edge of the tape edge, it reduces about 7.44 mm (0.293 inches) for the starting data position (boot zone ); In the edge of the tape, it is reduced to the end of the data (0.273 inches) to the termination data position (the tail is 0); these standards are not easily lost to effectively protect the data on the magnetic card. Since the magnetic recording data on the edge of the magnetic card is easily destroyed due to physical wear. The standard definition track of the track TRACK is generally customized according to special usage requirements, such as banking systems, securities systems, access control systems, identity identification systems, driver driving license management systems, etc., will be on magnetic cards. 3 Track on the magnetic card presents different application format requirements to present different application format requirements.
Here, we will mainly discuss three TRACK standard definitions on bank magnetic cards that meet international circulation bank / financial applications, which have also been widely applied to Visa credit cards, MasterCard credit cards, etc. We are commonly used for some bank cards. ● Lath TRACK1: Its data standard is initially completed by the International Air Transport Association IATA (International Air Transportation Association). The data and letters on TRACK1 record automation information in aviation transport, such as cargo tag information, transaction information, ticket schedule / sector, and so on. This information is read and written by a dedicated magnetic card read and write machine, and a set of application systems is served in the airline. The application system contains a database, and all of these magnetic cards can be found here. ● Lath TRACK2: Its data standard is initially completed by the "American Bankers Association". The information on the track has been adopted by many banking systems today. It contains some of the most basic information, such as the unique identification number of the card, the validity period of the card, etc. ● Lath TRACK3: Its data standard is initially completed by the fiscal industry (THRIFT). It is primarily applied to the general savings, payments, and credit units, and other applications that need to be changed, rewritten on magnetic card data. Typical applications include cash vending machines, prepaid cards (systems), lending cards (systems), and more. This type of application is a model of "offline", that is, the bank (verification) system is difficult to track data on the magnetic card in real time, which is manifested as the data and bank of TRACK3 on the user card ( Verify that the current data recorded in the system is different. The three tracks on the digital and character magnetic cards that are used on track (Track1, TRACK2, TRACK3) are generally encoded using the "bit" (bit) mode. According to the TRACK of the data, 5 Bit or 7 Bit make up one byte. TRACK1 (IATA): The record density is 210bp; can be recorded by 0 to 9 numbers and a ~ z letters; a total of up to 79 numbers or characters (including start ending characters and check) can be recorded; each character (one Bytes consists of 7 Bit. Since information on TRACK1 can not only be represented by numerals 0 to 9, the information can also be represented by letter A to z, so the information on TRACK1 generally records the type of magnetic card, the range, etc., "indicator", "description" Information. For example, in the bank card, Track1 records the user's name, the effective use of the card, and some other "tag" information. Track2 (ABA): The record density is 75bp; can be recorded 0 to 9 numbers, and the A ~ Z character can not be recorded; the total community can record up to 40 numbers (including the start end compassion and check); each data (one word The section is composed of 5 Bit. TRACK3: The record density is 210bp; can be recorded 0 ~ 9 numbers, and the A ~ Z letters cannot be recorded; the total community can record up to 107 numbers or characters (including start ends and checks); each character ( One byte) consists of 5 Bit.
