While credit and debit cards are extremely convenient, they've also opened up a whole new world of fraud. This makes the systems that retailers use to process these payments seem like great targets for hackers, and organizations from every corner of the globe are scrambling to secure themselves against these threats.
One big solution to this has been the Payment Card Industry Data Security Standard. The PCI DSS is a regulatory code that tells companies how they can better defend themselves against attacks levied to steal card data. It's an important tool in the fight against fraud and should be strictly followed.