Magnetic card knowledge introduction
1, magnetic card classification magnetic strip type: general anti-magnetic card (300oE) high anti-magnetic card (3500oE) direct printing type: low anti-magnetic card (300oE) (eg park tickets) High anti-magnetic card (2700oE) (eg: Metro card, phone card) 2. There are 3 tracks on the magnetic stripe and the track magnetic strip. The track 1 and the track 2 are read-only tracks, and the information recorded on the track when using can only read it without allowing writing or modification. The track 3 is a read-write track, and it can be read when used, or written. The track 1 records numbers (0-9), letters (A-Z) and other symbols (such as parentheses, separators, etc.), up to 79 numbers or letters. The characters recorded by the tracks 2 and 3 can only be numbers (0-9). The track 2 can record 40 characters, and the track 3 can record 107 characters. 3. Magnetic card reader generally non-financial field magnetic cards, only records the information in the second track, single 2-track read reader price 400 yuan / Taiwan, single 2-track readable readable reader price 1800 Yuan / Taiwan. Magnetic cards in the financial sector, magnetic tracks 1, 2, 3 can be used, such as ICBI with 1, 3 track, construction line 2, 3 track. 1, 2, 3 tracks can be readwritten, the reader is 4,800 yuan / Taiwan. As can be seen above, the magnetic card reader is very cheap, but the reader is more expensive. In general applications, the magnetic card only records read-only information such as personal accounts, and does not write information in the card. 4. Magnetic card security and existence problem A. The confidentiality and safety of the card is relatively easy to read, and the contents of the illegal modification of the magnetic strip are also easier, so that most cases the magnetic card is used as a static data input. Although the third track is readily written, and there is an amount of the field, it is only used in small amounts of applications, such as a telephone card. B. The application system using the magnetic card needs to have a reliable computer system and the central database in the financial industry, as a magnetic card for financial transaction cards, generally cooperate with powerful, reliable computer network system, amount, transaction record, etc., all saved in financial institutions. In a computer's database, the card held by the user is just index information such as the user's primary account, which is easy to quickly find user data in the database. Card International Standard 1. ISO 7810: 1985 Identifying the physical properties of the card specify the physical characteristics of the card, including the material, constructor, and size. The size of the card is: width 85.72mm ---- 85.47mm height 54.03mm ---- 53.92mm thickness 0.76 ± 0.08mm card four-corner fillet radius 3.18mm General Talk card size is: 85.5 x 54 x 0.76 2. ISO 7811-1: 1985 Identification Card Recording Technique Part 1: Convexing the requirements for the convex character (character set, font, character spacing, and character height). 3. ISO 7811-2: 1985 Identification Card Recording Technique Part 2: Magnetic strip specifies the characteristics, encoding techniques, and encoded character sets of cards.
