Appendix B: Add BLS CDDL definitions for Leios cryptography #27
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will-break-it
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Nov 25, 2025
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will-break-it
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will-break-it
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Thanks for the fixes and the additions!
ch1bo
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Nov 27, 2025
ch1bo
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Dec 4, 2025
CIP-0164/README.md
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| Leios uses **BLS12-381 MinSig** (small signature, large verification key). | ||
| – Verification key = compressed G2 = 96 bytes | ||
| – Signature = compressed G1 = 48 bytes | ||
| – Proof-of-Possession = 48 bytes |
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@hjeljeli32 Rendering of this list is off
IIRC we used prettier to format the markdown during editing and there is https://github.com/input-output-hk/ouroboros-leios/blob/main/scripts/format-cip.sh
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@ch1bo
I ran the format-cip.sh formatter and also fixed the Unicode dashes in the MinSig list so the Markdown renders correctly now.
Thanks for catching that!
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This PR adds the missing CDDL definitions for Leios BLS cryptographic objects:
• Verification keys
• Signatures
• Proofs-of-possession
• MinPk and MinSig size variants
The update follows the team discussion confirming that:
• All BLS objects are encoded as fixed-size bytes in CDDL
• MinPk is the expected variant for Leios deployment
• Consensus may switch to MinSig without modifying other CDDL structures