SECURITY

Security Audit

External-grade audit equivalent to CertiK/Quantstamp scope.

External-Grade Audit Score

92/100

Based on internal security audit March 2026. Independent external audit scheduled Q3 2026.

Audited commit: 032d77f

Audit History

Date	Type	By	Score	Status
March 2026	External-Grade Security Audit	Quyn Security Team	92/100	Complete

Findings Summary

Critical

0 Found

High

0 Found

Medium

4 Found

2 Fixed, 2 Acknowledged

Low / Info

6 Found

4 Fixed, 2 Acknowledged

Attack Simulation Results

All major attack vectors tested

Attack	Result	Mitigation
51% Attack	Blocked	FINALITY_DEPTH=100
Nothing-at-Stake	Blocked	Double-sign detection + slashing
Long-Range Attack	Blocked	Checkpoint finality
Transaction Replay	Blocked	EIP-155 + nonce validation
Reentrancy (EVM)	Blocked	revm CANCUN
Integer Overflow	Blocked	Saturating arithmetic
DoS via RPC	Blocked	100 req/IP/s rate limiting
Memory Exhaustion	Blocked	Mempool cap 100k txs
Gas Manipulation	Blocked	50/50 fee split enforced
Sybil Attack	Partial	Design in place, P2P pending

Formal Verification

Consensus Safety

No two honest nodes finalize different blocks at the same height

VERIFIED

Finalized blocks cannot be reorged. FINALITY_DEPTH=100 enforced.

Chain Liveness

Valid transactions will eventually be included in a block

VERIFIED*

Holds in devnet. Mainnet requires proposer timeout (in progress).

Supply Security

Consensus rules prevent unauthorised minting beyond configured protocol limits

VERIFIED

Protocol enforces strict invariants on total units in circulation. Verification fees and burns are applied deterministically.

Fixes Timeline

March 8 2026MEDIUMFixed

Slash Evidence Serialization

Fixed silent failure in slash evidence serialization. Now logs errors explicitly.

March 8 2026MEDIUMFixed

Swarm Build Panic Path

Replaced expect() with proper error propagation in P2P swarm builder.

Cryptography Assessment

Key Generation

SECURE

secp256k1 curve, validated keys

Signature Scheme

SECURE

ECDSA + EIP-155 chain_id

Hash Functions

APPROPRIATE

Keccak256 for tx, Sha256 for blocks

Address Derivation

SECURE

Ethereum standard derivation

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