zkDaily - 2026-04-01

零知识证明 zkDaily

ZKP Frontier Tracker 🎯

Wed

04.01

2026

Post-Quantum Blockchains with Agility in Mind

Paper

https://eprint.iacr.org/2026/609

Manuel B. Santos EVM Signature

Santos et al. proposed an EVM-compatible blockchain design with cryptographic agility in their paper, featuring CATX transaction format and consensus-layer key registration to address quantum threats.

Notes

Blockchains need long-term integrity, but cryptographic primitives may fail due to quantum advances.
Existing systems lack comprehensive cryptographic agility support for seamless algorithm transitions.
Proposed flexibility framework distributes algorithm choice across blockchain components.
Designed CATX transaction format decouples body and signature for user-selected schemes.
Consensus-layer key registration enables validator migration between schemes without hard forks.
Experimental evaluation shows CATX format introduces no measurable overhead with various signatures.

Collected by @icerdesign

零知识证明 zkDaily

Q&A Deep Dive 💬

Wed

04.01

2026

What is cryptographic agility and why do blockchains need it?

Cryptographic agility means a system can switch cryptographic algorithms without disrupting operation. Blockchains need it because current schemes such as ECDSA may be weakened by quantum computing or future attacks.

What is CATX and what problem does it solve?

CATX is a new transaction format that decouples the transaction body from the signature. This lets users choose their preferred signature scheme without affecting execution logic, improving migration flexibility.

Why does CATX introduce almost no performance overhead?

Because it mainly changes the signature encapsulation layer without altering the EVM execution path. The transaction body is processed as usual, while signature verification becomes pluggable, leading to no measurable overhead across 11 million transactions.

Prompted by @icerdesign