A credit card number is an example of PII that you need to prevent from leaving your enterprise network. PII, or personally identifiable information, is any information that can be used to identify an individual, either alone or in combination with other data. PII can be sensitive or non-sensitive, depending on the level of protection required and the potential harm if exposed. Sensitive PII includes data that can directly identify an individual and cause significant harm if leaked or stolen, such as financial information, medical records, or government-issued ID numbers. Non-sensitive PII includes data that is easily accessible from public sources and does not pose a high risk of identity theft, such as zip code, race, or gender. A credit card number is a sensitive PII because it can be used to access the cardholder’s account, make fraudulent transactions, or steal their identity. Therefore, it is important to prevent credit card numbers from leaving the enterprise network, where they could be intercepted by hackers, malicious insiders, or third parties. To protect credit card numbers and other sensitive PII, enterprises should implement data security measures such as encryption, tokenization, masking, access control, auditing, and monitoring. Additionally, enterprises should comply with data privacy laws and standards that regulate the collection, use, and protection of PII, such as the Payment Card Industry Data Security Standard (PCI DSS), the General Data Protection Regulation (GDPR), or the California Consumer Privacy Act (CCPA). References:

What is PII? Examples, laws, and standards | CSO Online

What is Personally Identifiable Information (PII)? | IBM

What Is Personally Identifiable Information (PII)? Types and Examples

What is PII (personally identifiable information)? - Cloudflare

What is Personally Identifiable Information (PII)? - Data Privacy Manager