A method and device for preventing magnetic card information from being copied

Abstract

The invention discloses a method and a device for preventing magnetic card information from being copied. Normal magnetic card information and a section of random information are written in a magnetic card, a magnetic strip with the random information written is randomly damaged by laser or a magnetic eraser, binary digits of the damaged part of a magnetic storage medium cannot be read, that is, mistakes can occur when a terminal reads information from the position, the mistake conditions cannot be copied, and the mistaken read position information can serve as digital fingerprints of the magnetic card for true-false identification of the magnetic card. The magnetic card using the technology can be prevented from being copied, and the magnetic card of a user can be effectively prevented from being copied and stolen. According to the method and the device, existing terminal reading equipment is not required to be replaced and modified, and good practicability is realized.

Description

technical field [0001] The invention relates to the field of information security, in particular to a method and device for preventing magnetic card information from being copied. Background technique [0002] A magnetic card is a card-shaped magnetic recording medium, which uses a magnetic carrier to record character and digital information for identification or other purposes. Because magnetic cards are low in cost, easy to use, easy to manage, and have a wide range of uses, they can be used to make credit cards, bank cards, and various transportation charge cards, etc., and have been used in all aspects of national life. In the financial industry, after decades of popularization and use, the popularity and usage of magnetic cards are very high. In the financial industry, the magnetic card used as a financial transaction card is generally used with a powerful and reliable computer network system. Information such as amount and transaction records are stored in the databas...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the security problems caused by the easy copying of magnetic card information, some people have also proposed some solutions, such as patent 2009100965013, which proposes to install two devices, a card reading head and a card writing head, on the card reader, and divide them into the keyboard buttons of the cipher. Up and down, clear and dark are set, when the password is entered, the card writing head automatically rewrites the information data in the magnetic card, so that the magnetic card cannot be copied by others; another example is patent 2011101310054, which uses analog information on ordinary magnetic cards, and in the existing Add a reading and writing device for analog signals to the card reading device, and then use the analog information as a magnetic card feature to prevent copying

These methods all need to replace and transform the magnetic card reading equipment of terminals such as existing POS machines, so they are not practical.

And criminals can also read the information on the magnetic card by updating the stolen device, because theoretically all the information on the magnetic card can be read accurately and can be copied correctly, so strictly speaking, these methods cannot prevent the magnetic card from being stolen. The information on was copied

Another example is patent 200910147078.5, which also adopts the method of comparing the magnetic track and modifying the terminal magnetic card reading device to realize the anti-counterfeiting of the magnetic card. In this patent, the fingerprint is only used to control the reading process of the information on the magnetic card, so that there is information on the position of the fingerprint on the fingerprint track. Therefore, the magnetic card produced by this patent, although the attacker cannot completely reproduce the same magnetic card as the original card, can generate a card containing all useful information based on the normally read information. information and can be used on ordinary card reading equipment, so this patent cannot prevent the bank card from being swiped.