mobile-crypto-patterns SKILL.md skillA
mobile-crypto-patterns from hermeticormus/libresecops-claude-code is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hermeticormus/libresecops-claude-code/mobile-crypto-patterns@git:20260930.71a2663Pins git:20260930.71a2663 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hermeticormus/libresecops-claude-code
- Path
plugins/mobile-app-security/skills/mobile-crypto-patterns/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260930.71a2663, committed Sep 30, 2026
- First version recorded
- Feb 25, 2026
- Size
- 9,011 bytes
- Repository stars
- 4
- License
- MIT
Mobile cryptography patterns for Android Keystore and iOS Secure Enclave, Keychain, and CryptoKit: key storage, data-at-rest encryption, password key derivation, TLS and certificate pinning, and secure randomness. Use when implementing or reviewing crypto in a mobile app.
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
# Mobile Crypto Patterns > Secure cryptographic implementation patterns for Android and iOS, covering key storage, data-at-rest encryption, transport security, and common mobile crypto pitfalls. ## Knowledge Base ### Platform Crypto Primitives Mobile platforms provide hardware-backed cryptographic capabilities that should always be preferred over software-only implementations. **Android Keystore System**: - Hardware-backed key storage (TEE or StrongBox on supported devices) - Keys never leave the secure hardware in plaintext - Supports key use restrictions (user authentication required, time-based validity) - Supports AES, RSA, EC, HMAC operations - Key attestation for verifying hardware backing **iOS Secure Enclave**: - Hardware-backed key storage in dedicated security coprocessor - Supports P-256 elliptic curve operations natively - Keys bound to device, cannot be exported - Biometric-gated key access through LocalAuthentication + Keychain - CryptoKit provides modern Swift API for crypto operations ### Symmetric Encryption **Recommended**: AES-256-GCM (authenticated encryption, provides confidentiality + integrity) **Android implementation**: ```kotlin …
Read the whole file at its exact version.
How to install
mdr add hermeticormus/libresecops-claude-code/mobile-crypto-patterns@sha256:ef2021d20af52a6fThe line at the top of this page pins the label git:20260930.71a2663, 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_6ptgtkndoxoj4tts)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Feb 25, 2026 and Sep 30, 2026, about one every 218 days. Its first recorded version is graded C and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260930.71a2663 latest | 2026-09-30 | 71a2663 | 9,011 B | A | view · diff |
| git:20260225.4a0a620 | 2026-02-25 | 4a0a620 | 8,683 B | C | view |
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 (9011 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
hermeticormus/libresecops-claude-code · 4 stars · license MIT · pushed 2026-10-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6ptgtkndoxoj4tts GET https://markdownregistry.com/api/v1/resolve?ref=hermeticormus/libresecops-claude-code/mobile-crypto-patterns GET https://markdownregistry.com/api/v1/blob/ef2021d20af52a6f0d2b62e8960dd0b77d31420fdfe530d344d10156fcb21108
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.