Can this skill help me audit old codebases?

Absolutely. It contains a list of deprecated and broken algorithms like MD5, SHA-1, and DES that should be flagged and replaced during security reviews.

Does it provide specific code for password hashing?

Yes, it includes detailed C# implementation examples for Argon2id and bcrypt, including recommended work factors and salt handling.

What algorithms does this skill recommend for encryption?

The skill prioritizes modern, authenticated encryption like AES-256-GCM and ChaCha20-Poly1305 for symmetric data, and RSA-OAEP or X25519 for asymmetric operations.

Does it cover post-quantum security?

The skill includes considerations for post-quantum readiness, helping you choose algorithms that provide better long-term security as quantum computing evolves.

Is this skill relevant for web server configuration?

Yes, it includes recommended TLS protocol settings and cipher suites for Nginx to ensure secure transport layer communication.

Secure Cryptography Guide

Name: Secure Cryptography Guide
Author: melodic-software

bymelodic-software

•

Security & Testing

Implement and audit cryptographic operations using industry-standard algorithms, secure hashing, and key management patterns.

The Cryptography skill empowers developers to integrate robust security measures into their applications through expert guidance on encryption, hashing, and secure communication. It provides comprehensive references for selecting modern algorithms like AES-256-GCM and Argon2id while identifying deprecated methods that should be avoided. Whether you are configuring TLS/SSL for a web server, implementing digital signatures, or managing cryptographic keys, this skill offers the implementation patterns and benchmarked work factors necessary to ensure data integrity and confidentiality.

Key Features

01Algorithm selection quick-reference for symmetric and asymmetric encryption

02Best-practice TLS 1.3/1.2 configuration templates

03Post-quantum cryptography readiness and legacy audit guidance

04Secure password hashing implementations including Argon2id and bcrypt

05Digital signature and key derivation code patterns

0612 GitHub stars

Use Cases

01Configuring Nginx or application servers with secure TLS cipher suites

02Upgrading legacy MD5 or SHA-1 hashing to modern memory-hard password storage

03Selecting the most secure and performant encryption for sensitive database fields

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add melodic-software/claude-code-plugins cryptography

For use in Claude.ai and ChatGPT

Download Skill