ios-security SKILL.md skillA
ios-security from jordancoin/ios-skills-collection is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jordancoin/ios-skills-collection/ios-security@git:20260329.893209fPins git:20260329.893209f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jordancoin/ios-skills-collection
- Path
skills/dpearson2699--ios-security/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260329.893209f, committed Mar 29, 2026
- Size
- 17,113 bytes
- Repository stars
- 6
- License
- a license file GitHub does not identify
Secure iOS apps with Keychain Services, CryptoKit encryption, biometric authentication (Face ID, Touch ID), Secure Enclave key storage, LAContext, App Transport Security (ATS), certificate pinning, data protection classes, and secure coding patterns. Use when implementing app security features, auditing privacy manifests, configuring App Transport Security, securing keychain access, adding biometric authentication, or encrypting sensitive data with CryptoKit.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# iOS Security
Guidance for handling sensitive data, authenticating users, encrypting
correctly, and following Apple's security best practices on iOS.
## Contents
- [Keychain Services](#keychain-services)
- [Data Protection](#data-protection)
- [CryptoKit](#cryptokit)
- [Secure Enclave](#secure-enclave)
- [Biometric Authentication](#biometric-authentication)
- [App Transport Security (ATS)](#app-transport-security-ats)
- [Certificate Pinning](#certificate-pinning)
- [Secure Coding Patterns](#secure-coding-patterns)
- [Privacy Manifests](#privacy-manifests)
- [Common Mistakes](#common-mistakes)
- [Review Checklist](#review-checklist)
- [References](#references)
## Keychain Services
The Keychain is the ONLY correct place to store sensitive data. Never store
passwords, tokens, API keys, or secrets in UserDefaults, files, or Core Data.
### Storing Credentials
```swift
func saveToKeychain(account: String, data: Data, service: String) throws {
let query: [String: Any] = [
kSecClass as String: kSecClassGenericPassword,
kSecAttrAccount as String: account,
kSecAttrService as String: service,
kSecValueData as String: data,
…Read the whole file at its exact version.
How to install
mdr add jordancoin/ios-skills-collection/ios-security@sha256:2da21c433b783169The line at the top of this page pins the label git:20260329.893209f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_4wgvc3k4gyebunj5)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 29, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (17113 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
jordancoin/ios-skills-collection · 6 stars · license a license file GitHub does not identify · pushed 2026-09-10 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4wgvc3k4gyebunj5 GET https://markdownregistry.com/api/v1/resolve?ref=jordancoin/ios-skills-collection/ios-security GET https://markdownregistry.com/api/v1/blob/2da21c433b783169fe51c946fa409dd6b700c793e9f6e9c5acc569a8c3275bd7
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from jordancoin/ios-skills-collection
Every file in jordancoin/ios-skills-collection