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mukul975
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Complete skill folder anatomy across all cybersecurity skills: - scripts/agent.py: 80-150 line Python agents using real libraries (impacket, boto3, azure-mgmt-*, kubernetes, pefile, yara, scapy, shodan, stix2, etc.) - references/api-reference.md: real API documentation with method signatures - LICENSE: MIT license for all skill folders
51 lines
1.6 KiB
Markdown
51 lines
1.6 KiB
Markdown
# API Reference: Zero-Knowledge Proof Authentication
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## hashlib (Python Standard Library)
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### PBKDF2 Key Derivation
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```python
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import hashlib
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key = hashlib.pbkdf2_hmac("sha256", password.encode(), salt.encode(), iterations)
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```
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### SHA-256 Hashing (Fiat-Shamir Heuristic)
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```python
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challenge = int(hashlib.sha256(data.encode()).hexdigest(), 16) % prime
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```
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## secrets (Python Standard Library)
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| Function | Description |
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|----------|-------------|
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| `secrets.randbelow(n)` | Cryptographically secure random int in [0, n) |
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| `secrets.token_hex(n)` | Random hex string of n bytes |
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| `secrets.token_bytes(n)` | Random bytes of length n |
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## Schnorr Protocol Steps
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| Step | Prover | Verifier |
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|------|--------|----------|
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| Setup | Private key x, public key y=g^x mod p | Knows g, p, y |
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| Commit | Pick random k, send r=g^k mod p | Receive r |
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| Challenge | - | Send random c |
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| Response | Send s = k - c*x mod (p-1) | Check g^s * y^c == r mod p |
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## Fiat-Shamir Heuristic (Non-Interactive)
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```
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c = H(g || r || y) # Challenge derived from hash
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s = k - c * x mod (p-1)
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```
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## ZKP Properties
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| Property | Guarantee |
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|----------|-----------|
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| Completeness | Honest prover always convinces verifier |
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| Soundness | Dishonest prover fails with high probability |
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| Zero-Knowledge | Verifier learns nothing beyond validity |
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## References
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- Schnorr Protocol: https://en.wikipedia.org/wiki/Schnorr_identification
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- RFC 8235 (Schnorr NIZK): https://www.rfc-editor.org/rfc/rfc8235
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- hashlib docs: https://docs.python.org/3/library/hashlib.html
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- secrets docs: https://docs.python.org/3/library/secrets.html
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