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sica-fondt/knowledge/cyber-skills/skills/implementing-digital-signatures-with-ed25519/assets/template.md
Claude 24f816b6a3
Consolidate 22 sibling repos into layered organism structure 
Place useful parts of the surrounding repos into sica-fondt by layer, per the
body model (Ada = membrane; brain/endocrine/capabilities/knowledge non-Ada):

- brain/        LLM reasoning + providers (dapr, hermes, MoMoA)
- capabilities/ REPRAG sidecars: hermes tools/skills, dapr tools, parallel
                dispatch, A51 channels, and the OSINT cluster
- knowledge/    LORAG corpus: 754 cyber-skills, agency personas, secure-coding,
                MITRE ATT&CK data
- reference/    defensive threat-reference (C3, shhbruh doc) + AdaYaml parser

License handling: AGPL sources (worldosint, advanced_evolution, mercury,
Reticulum) and GPL DeTTECT are SPEC-only clean-room/port descriptions — no
copyleft code copied. MIT/Apache/data parts copied as working trees.

Safety: shhbruh escape/persistence material and C3 covert-C2 kept as reference
only, not wired into the running organism. See CONSOLIDATION.md.

https://claude.ai/code/session_01UehUqEXXJJCsHoA4voCU5c
2026-06-10 06:53:01 +00:00

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Ed25519 Digital Signatures Template

Quick Reference

from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey

# Generate
private_key = Ed25519PrivateKey.generate()
public_key = private_key.public_key()

# Sign
signature = private_key.sign(b"message data")

# Verify
public_key.verify(signature, b"message data")  # raises InvalidSignature on failure

Key Formats

Format Private Key Size Public Key Size Signature Size
Raw 32 bytes 32 bytes 64 bytes
PEM (PKCS#8) ~119 bytes ~90 bytes N/A
SSH ~83 bytes ~51 bytes ~83 bytes

Use Cases

  • API request authentication (sign request body)
  • Software/code signing
  • Document signing
  • Git commit signing (ssh-ed25519)
  • JWT signing (EdDSA algorithm)
  • Certificate signing (X.509 with Ed25519)