What is Personally Identifiable Information (PII)?
Data that identifies a specific person.
Short answer
Personally identifiable information, or PII, is any data that can identify an individual, such as names, emails, phone numbers, addresses, financial details, and government IDs. When PII is sent to an AI tool, it creates exposure under regulations like GDPR, HIPAA, and India's DPDP Act.
In depth
PII is the most regulated category of data, and AI usage has made it the easiest to leak. A support agent summarizing a ticket, a recruiter formatting a candidate list, or a marketer personalizing an email all paste PII into AI tools routinely.
LeakSnitch flags PII by format with checksum validation for high stakes identifiers like credit cards and Aadhaar numbers, so legitimate uses are not blocked by random number collisions. Context signals decide whether a single email is a leak or part of normal work.
Frequently asked questions
Which PII does LeakSnitch detect?
Email, phone, address, credit card, Aadhaar, PAN, bank account, UPI, insurance, medical, and student data, among others. The complete public pattern list is available on the What We Block page.
Related terms
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