Start sentinel - This is represented by one character. It indicated the beginning of the data. Format code="B"- one character. There are several formats: A which is reserved for proprietary use of the card issuer, B described here,
C to M reserved by ANSI Subcommittee X3B10 and N to Z used by individual card holders Primary account number- Your credit card account number Name- Your name Field Seperator- Seperators fields Expiration date- Your card is valid till this date Service- This is a three digit value that instructs that conveys information to the merchants terminal on how a card should be processed. Discretionary data- This data may include the Pin Verification Key Indicator (PVKI), Pin Verification Value (PVV), Card Verification Value
(CVV) or Card Verification Code (CVC).
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End sentinel- Encoded at the end of the data, and indicates to the reader (or decoder) the end of the data. Longitudinal redundancy check (LRC)- Inserted immediately after the End sentinel, and checks for error.
Track two has the following:
- Start sentinel
- Primary account number
- Seperator
- Expiration date
- Discretionary data
- End sentinel
- LRC
2. Signature Stripe - Your signature goes here. A card is not valid unless this is signed.
3. Card Security Code aka Card Verification Value or Code (CVV or CVC) - There are two security codes on your card. One, CVC1 encoded in the magnetic stripe and the second, CVV2 or CVC2, on the back of your card. The CVV2 or CVC2 code aka Credit Card ID, is often required by merchants to verify transactions in which the card is not presents such as over the internet, the phone, etc.
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