Payment Card Industry Data Security Standard

The Payment Card Industry Data Security Standard (PCI DSS) is a set of rules that companies must follow to make sure that when people use a credit or debit card to pay for something, their information is kept safe. It includes things like putting up firewalls to protect your computer system from hackers, making sure you have secure passwords, and making sure that you don't store card numbers in your system. Companies that don't follow the rules can be fined and face other punishments.