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swift-security-expert

Identify insecure patterns in iOS/macOS Keychain and biometric authentication code.

Updated Apr 4, 2026
Search Tags:#security#swift#crypto#keychain#biometric#masvs
One-click install
npx skills add https://github.com/curtislmartin/daily-ascent-engineering --skill swift-security-expert-curtislmartin
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-security-expert
Source: https://github.com/curtislmartin/daily-ascent-engineering/tree/main/skills_repo/swift-security-expert
Command: npx skills add https://github.com/curtislmartin/daily-ascent-engineering --skill swift-security-expert-curtislmartin

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Developers struggle to ensure correct, secure implementation of Keychain services, biometric authentication, CryptoKit cryptography, and compliance with OWASP MASVS on Apple platforms, leading to vulnerable apps.

Core Features & Use Cases

  • Comprehensive Review: Audits existing Keychain and security code against a checklist of anti‑patterns and OWASP mappings.
  • Migration Guidance: Provides step‑by‑step instructions to modernize legacy storage, adopt Secure Enclave, and implement biometric‑bound secrets.
  • Implementation Templates: Ready‑to‑use Swift snippets for secure keychain CRUD, biometric prompts, certificate pinning, and CryptoKit operations.
  • Compliance Mapping: Aligns findings with MASVS v2.1.0 and MASTG test cases for easy audit reporting.

Quick Start

Ask the swift-security-expert skill to review the Keychain code of MyApp and list any insecure patterns.

Frequently Asked Questions about swift-security-expert

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

FAQPage Schema
How do I identify insecure Keychain patterns in my Swift iOS app?▼

To identify insecure Keychain patterns, audit your Swift storage code against anti-pattern checklists and OWASP MASVS mappings to detect gaps in SecAccessControl flags and biometric protection. This review flags missing access controls and unprotected secrets.

What is the best way to implement biometric-bound secrets in iOS Keychain?▼

Implementing biometric-bound secrets requires using SecAccessControl flags with the Secure Enclave to tie keychain items to biometric authentication. This ensures secrets are only released upon successful TouchID or FaceID verification.

How do I map iOS security code to OWASP MASVS compliance requirements?▼

Mapping iOS security code to OWASP MASVS involves aligning keychain and CryptoKit implementations with MASVS v2.1.0 and MASTG test cases. This generates an audit report detailing compliance status for secure storage and cryptography controls.

Does CryptoKit work with Secure Enclave for certificate pinning in Swift?▼

CryptoKit works with Secure Enclave for cryptographic operations, while certificate pinning verifies server identities during network requests. Combining them ensures keys are hardware-isolated and network traffic is protected against interception.

How to migrate legacy iOS storage to Secure Enclave protected Keychain items?▼

Migrating legacy iOS storage to Secure Enclave protection requires step-by-step modernization of existing data to use biometric-bound keychain CRUD operations. This transition upgrades insecure storage to hardware-isolated security.

When should I use SecAccessControl flags for macOS biometric authentication?▼

Use SecAccessControl flags for macOS biometric authentication when you need to restrict access to keychain items based on biometric verification. This prevents unauthorized access to sensitive data when the device is unlocked.

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