Secrets like API keys, passwords, and tokens are a major breach vector in modern software, often leaking through git commit history. Simple regex-based detection is insufficient — effective tools combine provider-specific pattern matching, entropy analysis, contextual checks, anti-dictionary filters, and active validation to reduce false positives. Detection should be deployed at multiple layers: remote git repositories (scanning full history), local developer environments via pre-commit hooks and IDE plugins, and CI/CD pipelines. When evaluating tools, use real honeytokens and historical scans rather than obvious fake keys. When a leak is found, immediately rotate the credential, assess scope, remove it from history, and audit for similar leaks.
Table of contents
What counts as a "secret" in software?How secrets typically leakHow widespread is the problem?Why SAST alone isn't enoughWhy secrets detection is harder than "just regex"What good secrets detection looks likeTesting a secrets detection tool (and the common trap)Where to deploy secrets detectionQuick remediation checklist when you find a leaked secretRecap: the essentialsSort: