What encryption standards must be used according to PCI DSS?

The PCI DSS (Payment Card Industry Data Security Standard) emphasizes the necessity for strong encryption methods to protect sensitive payment card data. The correct answer identifies that strong encryption methods such as AES-256 are mandated because they provide a robust level of security against unauthorized access and data breaches.

Strong encryption algorithms, like AES-256, are widely recognized for their effectiveness in securing data, making it exceedingly difficult for attackers to decrypt sensitive information without the correct keys. The requirement for strong encryption helps ensure that even if data is intercepted or accessed without authorization, it remains unreadable and thus protects cardholder data from misuse.

In contrast, options suggesting weak encryption methods or stating any encryption method suffices are not aligned with PCI DSS requirements, as these could leave sensitive information vulnerable to compromise. Additionally, while tokenization is a security measure, it does not replace the need for strong encryption methods in the broader context of protecting cardholder data. Thus, the emphasis on using strong encryption methods underlines the commitment to safeguarding payment card information as required by PCI DSS.