keychain-secure-storage

Store and manage sensitive tokens and secrets in the iOS Keychain.

1|Updated Apr 24, 2026

Search Tags:#security #authentication #ios #biometrics #keychain #secure-storage #app-groups

Ready to run

npx skills add https://github.com/dimitriRemoiville/cc-mobile --skill keychain-secure-storage

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: keychain-secure-storage
Source: https://github.com/dimitriRemoiville/cc-mobile/tree/main/plugins/cc-mobile-ios/skills/keychain-secure-storage
Command: npx skills add https://github.com/dimitriRemoiville/cc-mobile --skill keychain-secure-storage

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Keychain patterns are centralized by providing a small, reusable wrapper for tokens and secrets, with robust access control APIs so apps don't scatter SecItem calls across the codebase.

Core Features & Use Cases

Unified SecureStore protocol and a concrete KeychainStore that can read, write, and delete secrets with configurable accessibility.
Biometric- or passcode-based access control and per-device security options to protect secrets.
App groups and keychain sharing across related targets, with migration guidance from UserDefaults for on-device storage of sensitive data.

Quick Start

Install KeychainStore, implement SecureStore, and begin reading and writing tokens with the desired accessibility.

Frequently Asked Questions about keychain-secure-storage

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I securely store tokens in the iOS keychain with biometric access?▼

To securely store tokens in the iOS keychain with biometric access, you use a wrapper that provides a SecureStore protocol with configurable KeychainAccessibility. This allows your app to read, write, and delete secrets while enforcing biometric or passcode-based access control.

Can I share keychain secrets across iOS apps and extensions using app groups?▼

Yes, you can share keychain secrets across iOS apps and extensions by configuring app groups and keychain sharing. The SecureStore implementation supports optional app group sharing, allowing related targets to securely access the same on-device tokens and secrets.

What's the best way to migrate sensitive data from UserDefaults to the iOS keychain?▼

The best way to migrate sensitive data from UserDefaults to the iOS keychain is to use a centralized KeychainStore wrapper. It provides migration guidance and a unified SecureStore protocol to safely move on-device secrets out of UserDefaults into secure, access-controlled storage.

Does this iOS keychain wrapper require any external dependencies?▼

No, this iOS keychain wrapper does not require any external dependencies. It defines its own SecureStore protocol, KeychainStore implementation, and KeychainAccessibility enum natively, providing a self-contained solution for secure on-device secret management.

How do I test keychain secure storage logic without touching the real device keychain?▼

To test keychain secure storage logic without touching the real device keychain, you can use the included in-memory store. This test implementation conforms to the SecureStore protocol, allowing you to verify read, write, and delete operations for secrets safely in your testing environment.

Why centralize SecItem calls when managing iOS secure storage?▼

Centralizing SecItem calls when managing iOS secure storage prevents apps from scattering keychain code across the codebase. Using a reusable SecureStore wrapper provides robust access control APIs and consistent read, write, and delete operations for all sensitive tokens and secrets.