cryptography

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Cryptographic algorithms, protocols, and implementations for secure data protection

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What this skill does


# Cryptography Skill

> **Purpose**: Secure encryption, hashing, and key management.

## Operations Overview

| Operation | Input | Output |
|-----------|-------|--------|
| recommend_algorithm | use_case, level | primary, alternatives |
| analyze_implementation | code, language | vulns, recommendations |
| validate_parameters | algo, key, mode | is_secure, issues |
| generate_key_spec | algo, purpose | spec, rotation |
| analyze_protocol | protocol, version | security, hardening |

## Algorithm Reference

| Level | Symmetric | Asymmetric | Hash |
|-------|-----------|------------|------|
| 128-bit | AES-128 | RSA-3072, P-256 | SHA-256 |
| 192-bit | AES-192 | RSA-7680, P-384 | SHA-384 |
| 256-bit | AES-256 | RSA-15360, P-521 | SHA-512 |

## Use Case Recommendations

| Use Case | Recommended | Avoid |
|----------|-------------|-------|
| Encrypt at rest | AES-256-GCM | ECB |
| Password | Argon2id | MD5, SHA-1 |
| Signing | Ed25519 | RSA-1024 |
| Key exchange | X25519 | DH<2048 |

## Troubleshooting

```
Crypto Issue
    │
    ├─► E_DEPRECATED_ALGORITHM → Migrate to modern
    ├─► E_KEY_SIZE_INSUFFICIENT → Increase key size
    └─► E_INSECURE_MODE → Use GCM or Poly1305
```

## Version History

| Version | Date | Changes |
|---------|------|---------|
| 2.0.0 | 2025-01-01 | Production-grade with PQC |
| 1.0.0 | 2024-12-29 | Initial release |

Files: 4

Size: 8.3 KB

Complexity: 50/100

Category: General

Source: https://github.com/pluginagentmarketplace/custom-plugin-cyber-security/tree/main/skills/cryptography

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