Glossary term
What is PII (Personally Identifiable Information)?
PII stands for Personally Identifiable Information.
In System Design
Data that identifies a person. Example: Name, phone, email, address, ID numbers.
Learn it properly · System DesignLesson 46: Logs, Metrics & Traces: The Three Pillars“Checkout took 20 seconds and failed” — but checkout touches eleven components. How logs, metrics and traces each answer a different question, how to instrument with OpenTelemetry, and how linking them takes you from “something's wrong” to “here's why” in minutes.In Security for Developers
Data about a real person that can identify them, such as name, email, phone, address or ID number. Collect less, keep it shorter, and keep it out of logs.
Learn it properly · Security for DevelopersLesson 5: Secrets, Encryption and Data ProtectionWhere secrets leak (git, logs, front-end bundles), hashing vs encryption vs encoding, TLS in plain words, safe randomness, encrypting data with AES-GCM, and handling personal data.