Modern encryption alternative to GPG/PGP with post-quantum support and agent-to-agent communication.
What it does
Claude's default encryption suggestions are often outdated: recommending GPG for symmetric encryption, using RSA with PKCS#1 v1.5 padding (vulnerable to padding oracle attacks), suggesting key sizes that no longer meet current security standards, or missing post-quantum considerations for long-lived secrets. This skill loads modern cryptographic patterns: age for symmetric encryption, correct AEAD cipher selection, proper key derivation, post-quantum-resistant algorithms for secrets that need to outlive current hardware, and agent-to-agent communication encryption patterns. Made by grittygrease.
Use case
Any workflow involving encryption: encrypting files, securing secrets in agent pipelines, protecting data at rest, or building agent-to-agent communication that requires confidentiality. Use it whenever Claude's first instinct would be to reach for GPG.
"Encrypt these files for archival storage using a modern, auditable approach." "Set up agent-to-agent encrypted communication for this multi-agent workflow." "We need to encrypt customer PII at rest — recommend the right approach." "This is encrypting with RSA PKCS#1 v1.5 — replace it with a secure modern pattern." "Generate a key management plan for secrets that need to last 10+ years."
Describe what you need to encrypt, the threat model, and how long the secret needs to remain secure.
Claude selects the appropriate algorithm — you get the reasoning, not just the code.
For code review: paste existing encryption code and ask Claude to audit it against current standards.
Input
A description of the encryption use case: what's being encrypted, who the recipients are, the threat model, and the required longevity of the secret.
Output
Encryption code using modern, auditable patterns — correct algorithm selection, proper key derivation, authenticated encryption — with an explanation of why each choice was made.
npx skillsadd grittygrease/skills/safe-encryption
Requires skills.sh CLI
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