The stands for Stripe Secret Key . Stripe is one of the world's largest payment processors. To use their API (Application Programming Interface), developers are provided with: PK (Publishable Key): Used on the front end of a website.
A (Credit Card Checker) is a script or application designed to verify if a specific set of card details—such as the Card Primary Account Number (PAN), expiry date, and CVV—is active and valid. There are generally two types of checks: cc checker with sk key portable
Used on the server side to perform sensitive actions like creating charges or verifying customers. The stands for Stripe Secret Key