Learn How Credit Card Readers Work
The portable credit card reader is now a popularly used device since there are now many people who are relying on their credit cards instead of bringing cash. The plastic money has certainly replaced the physical cash. Debit cards and the credit cards are what most shoppers are now using since they are impressed with the kind of convenience that they get from just paying through their card instead of bringing a huge amount of money and pay for expensive purchases. The debit card or the credit card reader are required in various commercial retail shops. The credit card is definitely useless when there are no credit card readers. Because of this, the credit card companies encourage and bring tie-ups and also deals for the manufacture as well as the distribution of the card readers.
The technology in a portable magnetic card is based on the utilization of microcontrollers. Before you try to comprehend how a portable credit card reader functions, you should first know how the magnetic card is being encoded with the needed information that is then read by the card reader.
You should first know that credit cards have magnetically encrypted being written in them. Such code is being encoded on the card, in three strips which differ in their bit density. The code is encrypted in a way which doesn’t allow any other card reader to read and this is supplied with a decryption key as well.
The method of creating the magnetic cards is standardized nowadays and all of them are manufactured through a similar process. The three magnetic strips have 79, 40 and 107 characters. You should know that the data which is written in the strips uses the technology called Two Frequency Coherent Phase Recording. The data which will be written differs based on the utility of the magnetic card. You should know that the magnetic card can be something like the official RFID card or the credit card. The track of the magnetic card comes with the alphanumeric data and the rest are actually encoded with numbers. There are bits in the strip code which tell the card reader from where to begin reading or to stop reading. They are actually the sentinel bits.
As mentioned, the portable card reader is one kind of microcontroller device that is embedded with software and hardware made to read the cards’ magnetic strips. This has a read head, one for each track which reads the encrypted code. In order to get the card read, this must be swiped with the use of the credit card reader. The reader is set to be able to identify and authenticate a card. The credit card reader has the alphanumeric keypad for entering the details of the transaction prior and after swiping and reading the card.