Korttinumerot

Korttinumerot, also known as card numbers, are unique identifiers assigned to credit, debit, and prepaid cards. These numbers are typically 13 to 19 digits long and are encoded using the Luhn algorithm, which helps to detect errors in the number. The first digit of a card number indicates the type of card, with different ranges assigned to various card networks such as Visa, MasterCard, American Express, and Discover. The following digits provide information about the issuing bank and the cardholder's account. Card numbers are used for secure transactions, as they are encrypted and tokenized during payment processing to protect sensitive information. They are also used for fraud detection and prevention, as patterns and anomalies in card usage can be monitored. Card numbers are an essential component of the global payment system, enabling seamless and secure financial transactions.