Cross-Chain Bridge Infrastructure

$2 Billion Lost to Bridge Hacks. Yours cannot be next.

Cross-chain bridges are the single most exploited category in all of Web3 - responsible for over $3B in losses in the last year alone. Any institutional product moving assets between chains depends on bridge security that has historically been catastrophically inadequate.

Request Security Briefing → View Risk Surface ↗
HIGH
RISK
BRIDGE FILE · I · 03Critical surface
The single highest-value target in Web3.
Message validation, validator key custody, wrapped-token invariants, and economic security audited in one engagement.
Losses $3B+ last year Surface Contracts · validators · relayers Coverage Smart contract · economic · ops Retainer Real-time monitoring
Engagement: By briefingBrief us →
01 · Risk surface
The infrastructure connecting chains has lost over $3B. The code must be flawless.

"Every institutional product that crosses a chain boundary passes through infrastructure that has been exploited for over $3 billion in losses. That is not acceptable risk."

Message validation risk
Cross-chain message validation logic is the primary exploit surface - the Wormhole ($320M) and Nomad ($190M) hacks both exploited message verification failures.
Validator key security
Bridge security depends on validator/relayer node security - the Ronin ($625M) hack compromised validator private keys, not the smart contract logic.
Asset synchronisation
The synchronisation between locked assets on source chain and minted wrapped tokens on destination chain is a critical invariant that must be cryptographically enforced.
Economic security
The economic security of the validator set - the cost to corrupt a majority - must be commensurate with the total value locked in the bridge.
02 · Vulnerability vectors
Critical vulnerabilities specific to this product.

Every institutional product has a unique security surface. These are the vectors attackers target first and what CredShields audits first.

Cross-chain message validation exploit
The most common bridge exploit vector: flaws in the smart contract logic validating cross-chain messages allow attackers to forge or replay messages - minting wrapped tokens without locking underlying assets.
Validator & relayer key compromise
Bridge security ultimately depends on the private keys of validators and relayers. Compromise of a sufficient number of validator keys - as in the Ronin hack - allows full bridge drainage regardless of contract security.
Wrapped token mint/burn desynchronization
The invariant that total wrapped tokens minted on destination chain equals total assets locked on source chain must be cryptographically enforced. Any synchronisation gap allows value extraction.
03 · Engagement coverage
What a CredShields engagement covers.

Every engagement is scoped to your product architecture, regulatory jurisdiction, and launch timeline.

01·SMART CONTRACTS↗
Bridge Smart Contract Security Audit
Comprehensive audit of your bridge smart contracts, message validation, locked asset management, wrapped token logic, admin controls, and emergency mechanisms. The most critical security review in cross-chain infrastructure.
Message validation Wrapped tokens Admin controls
02·ECONOMIC↗
Bridge TVL & Economic Security Assessment
Assessment of the economic security of your bridge - the cost-to-corrupt the validator set relative to total value locked, and whether the bridge's security model is appropriately designed for its TVL.
Cost-to-corrupt TVL modelling Validator set
03·VALIDATORS↗
Validator & Relayer Infrastructure Review
Bridge security extends beyond smart contracts to the validator and relayer infrastructure. We review validator key management, operational security, multi-sig configuration, and economic security of the validator set.
Key management Multi-sig OpSec
04·RETAINER↗
Post-Deployment Bridge Monitoring Retainer
Bridge security does not end at deployment. Our managed retainer provides real-time cross-chain anomaly detection, rapid response to emerging threats, and periodic re-audit as your bridge evolves.
Real-time Anomaly detection Periodic re-audit
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Ready to test what's
actually exploitable?

Scope in hours. Report in days. No hidden fees, no drawn-out contracts, no vague promises - just a named pentester, a signed report, and a delivery date we commit to.

Secure your bridge

$2 Billion in Bridge Losses.
Your Bridge Cannot Add to That Number.

Request a bridge security briefing. We will scope the right audit across your bridge smart contracts, validator infrastructure, and economic security model.

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NDA available
Bridge security specialization
Economic security assessment
Validator review included
Named security lead
Dedicated bridge security specialist