How useful are credit card numbers anymore?
Blog post from Basis Theory
Credit and debit cards remain central to U.S. purchasing, but digital payments are expanding because wallets add convenience and security. A typical 15- or 16-digit card number contains identifiers for the card network, issuing institution, individual account, and a final checksum used to verify that the number is structurally valid, meaning several digits may be predictable to attackers. Although randomly guessing a specific active account is unlikely, criminals can acquire card data through breaches, social engineering, fake online stores, skimming, session hijacking, and automated testing of possible numbers. Chip cards, PINs, and portable payment terminals have reduced physical card fraud, while digital wallets increasingly protect card information through tokenization, local authentication, and transaction checks. Apple Pay’s merchant-specific payment account number, or MPAN, illustrates a model in which a token can be restricted to a particular merchant and type of charge, limiting its value if stolen. As payments increasingly shift toward digital wallets and virtual card credentials, merchants may need payment systems capable of securely managing tokenized data and flexible payment-service-provider relationships.
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