How Banks Protect Your Transactions

When you visit your bank's website, TLS (Transport Layer Security) encrypts every byte exchanged between your browser and the bank's server. Without TLS, an attacker on the same network could read your account balance, intercept credentials, or modify transactions.

Banks require TLS 1.2 or higher and typically enforce strict cipher suite policies to prevent downgrade attacks.

The magnetic stripe on older cards stores static data including the card number and expiration date. Anyone who reads the stripe can clone the card exactly.

EMV chips generate a unique cryptographic code for every transaction using a challenge-response protocol. Even if an attacker captures the transaction data, it cannot be reused to make fraudulent purchases.