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Application cryptography: hashing, AES-GCM and HMAC v1.0.0

Use this resource to implement hashing, encryption and signatures correctly in an application

New

  • 566 downloads
  • 128 likes
  • 226 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install application-cryptography-hashing

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent writes password hashing with bcrypt or Argon2, AES-256-GCM encryption, HMAC codes and secure random values, and flags dangerous patterns. It does not cover TLS or JWT tokens, which belong to other skills. You get ready-to-use functions and a list of mistakes to avoid.

Mostly picked by

Updated November 2, 2026

Card for the “Application cryptography: hashing, AES-GCM and HMAC” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: password hashing with bcrypt and Argon2
  • SKILL.md: AES-256-GCM encryption and HMAC codes
  • SKILL.md: secure random generation and anti-patterns

Good fit for

  • You store passwords or sensitive data in your database
  • You need to sign a message or verify its integrity between two services

Not for

    Tags

    • cryptography
    • hashing
    • argon2
    • encryption

    About

    You say

    “Write password hashing and verification functions with Argon2id for my Node API.”

    Card for the “Application cryptography: hashing, AES-GCM and HMAC” skill

    Skill published by claude-dev-suite under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to implement hashing, encryption and signatures correctly in an application
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md4 KB

    Origin and licence

    Listed unmodified

    Author
    claude-dev-suite
    Source
    github.com/claude-dev-suite/claude-dev-suite/tree/e10ab644ba43abe2abc923399226df4af7337214/skills/security/cryptography
    Licence
    MIT

    Notice

    « cryptography » (claude-dev-suite, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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