ios-security
Secure iOS apps with Keychain, biometrics, and data protection. Use when implementing Keychain storage, Face ID/Touch ID, or data protection in iOS. (triggers: **/*.swift, SecItemAdd, kSecClassGenericPassword, LAContext, LocalAuthentication)
Best use case
ios-security is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Secure iOS apps with Keychain, biometrics, and data protection. Use when implementing Keychain storage, Face ID/Touch ID, or data protection in iOS. (triggers: **/*.swift, SecItemAdd, kSecClassGenericPassword, LAContext, LocalAuthentication)
Teams using ios-security should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/ios-security/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How ios-security Compares
| Feature / Agent | ios-security | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Secure iOS apps with Keychain, biometrics, and data protection. Use when implementing Keychain storage, Face ID/Touch ID, or data protection in iOS. (triggers: **/*.swift, SecItemAdd, kSecClassGenericPassword, LAContext, LocalAuthentication)
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# iOS Security ## **Priority: P0 (CRITICAL)** ## Implementation Workflow 1. **Store secrets in Keychain** — Use `SecItemAdd`, `SecItemUpdate`, and `SecItemDelete` with `kSecClassGenericPassword` for tokens/PII. Never use `UserDefaults`. 2. **Add biometric auth** — Use `LocalAuthentication` with `LAContext`. Verify availability with `canEvaluatePolicy` before prompting. 3. **Encrypt files** — Use `Data.WritingOptions.completeFileProtection` when saving to disk. 4. **Keep ATS enabled** — Never disable App Transport Security globally in `Info.plist`. 5. **Pin certificates** — Use `ServerTrustManager` or `TrustKit` for production apps to prevent MITM attacks. 6. **Strip sensitive logs** — Ensure PII and tokens are removed from logs in Release builds. See [Keychain and biometrics implementation examples](references/implementation.md) ## Anti-Patterns - ❌ Secrets in `UserDefaults` — always use Keychain - ❌ Unhandled `LAError` — check for `userCancel`, `authenticationFailed`, etc. - ❌ PII/token logging in Release builds — strip sensitive data from all log output ## References - [Keychain & Biometrics Implementation](references/implementation.md) ## Related Topics - common/security-standards - architecture
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