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name: android-security description: Secure Android data at rest and authentication secrets. Use for auth tokens, encrypted storage, and app-data isolation; defer WebView/Intent/FileProvider to android-legacy-security and TLS/certificate pinning to android-networking. metadata: triggers: files: - 'network_security_config.xml' - 'AndroidManifest.xml' keywords: - EncryptedSharedPreferences - cleartextTrafficPermitted - intent-filter - api key - token storage - certificate pinning - root detection - secure storage

Android Security Standards

Priority: P0 (CRITICAL)

Implementation Guidelines

Data Storage

• Secrets: NEVER store API keys in code. Use EncryptedSharedPreferences for sensitive local data (Tokens).
• Keystore: Use Android Keystore System for cryptographic keys.

Network

• HTTPS: Enforce HTTPS via network_security_config.xml (cleartextTrafficPermitted="false").
• Pinning: Consider Certificate Pinning for high-security apps.

Component Export

• Exported: Explicitly set android:exported="false" for Activities/Receivers unless intended for external use.

Anti-Patterns

• No Sensitive Logs: Strip logs in Release builds.
• No Homebrew Root Detection: Use Play Integrity API instead.
• No Raw URL String Concatenation: Use Uri.Builder or HttpUrl (OkHttp) to prevent parameter injection.

References

• Setup Examples
• [common/common-security-standards] — shared OWASP baselines
• [android/android-legacy-security] — Intent, WebView, and FileProvider hardening