The days of blindly approving crypto transactions without understanding what you're signing may finally be coming to an end. In a major leap toward safer self-custody, Ledger has launched its Transaction Check feature - powered by Cyvers’s AI-based Threat Interceptor engine. This integration marks a new era of preemptive transaction protection, helping users avoid costly mistakes and targeted attacks before they happen.

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A Critical Problem in Web3: Blind Signing

Web3 users have long struggled with one of the most dangerous UX flaws in crypto: blind signing. Whether interacting with DeFi protocols, token approvals, or smart contract-based applications, users often confirm complex transactions without truly understanding the consequences.

This vulnerability has led to some of the most damaging security incidents in recent memory:

• Bybit lost $1.5 billion when compromised Ledger wallets signed off on a malicious transaction.
• WazirX suffered a $235 million loss due to a misinformed multisig approval.
• Radiant Capital fell victim to a $50 million breach through compromised signing devices.

These attacks didn’t happen because of smart contract bugs - they happened because people signed off on transactions they didn’t fully understand.

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Ledger’s Response: Transaction Check

On April 30, 2025, Ledger introduced Transaction Check for EVM-compatible blockchains, now available on Ledger Flex and Ledger Stax devices. The feature combines transaction simulation, machine learning, and real-time risk assessment to analyze every transaction before a user signs it.

Key features include:

• Human-readable explanations: Users receive a clear summary of what the transaction will actually do.
• Real-time threat scoring: Each transaction is assessed for risk, including phishing, address poisoning, and interaction with known malicious contracts.
• Integration with Ledger’s Clear Signing: Together, these features provide transparency and preemptive protection in a single flow.

By bringing clarity and security to the signing experience, Ledger gives users the confidence to interact with Web3 safely.

Transaction Check, powered by Cyvers, helps defend against a broad range of attack vectors that have cost platforms billions. By implementing Transaction Check, retail users can assure avoiding the risk of losing their funds and web3 platforms can avoid becoming the next Bybit or WazirX.  

Where Cyvers Comes In: The AI Threat Interceptor

At the core of Ledger’s Transaction Check is Cyvers’s Threat Interceptor - an AI-powered engine designed to flag malicious behavior in real time. Every Ethereum transaction is scanned by Cyvers’ system, which uses advanced graph-based anomaly detection, and geometric deep learning for creating a risk score for wallets, smart contracts and transactions to surface potential risks.

The Interceptor doesn’t just spot known bad actors - it identifies suspicious behavior patterns, even from wallets or contracts with no prior history. This preemptive approach is what makes it so effective against emerging threats like:

• Wallet hacks
• Address poisoning
• Pig butchering scams
• Malicious contract upgrades
• Fraudulent token approvals
• And more

Expanded Protection: Co-Signer Integration

In addition to its work with Ledger, Cyvers is also extending the capabilities of its Threat Interceptor through a co-signer solution in collaboration with companies such as Station70. This solution introduces multi-layer pre-signing checks, ideal for institutional platforms that rely on Fireblocks, MPC wallets, or multisig frameworks.

By integrating transaction simulation, anomaly detection, and co-signing into a seamless process, Cyvers enables platforms to block high-risk transactions before they are executed - dramatically reducing the risk of internal or external compromise.

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Beyond Ledger: A Modular Solution for Wallets, Custodians, and Exchanges

Cyvers's Threat Interceptor is built to integrate with any Web3-facing infrastructure. Its core capabilities include transaction simulations and validation for assessing the malicious potential of the transaction.

For wallet providers, centralized exchanges, and DeFi protocols, Cyvers offers premptive defense without disrupting user experience or operational flow. Whether preventing wallet hacks, smart contract vulnerabilities phishing, or rug pulls Cyvers's system is adaptable and enterprise-ready.

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A Safer Web3 Starts Before You Sign

This partnership between Cyvers and Ledger is more than just a product integration - it’s a shift in security culture. Moving away from passive alerts and post-mortem analysis, it ushers in proactive defense that puts users in control.

By delivering human-readable transparency, real-time threat intelligence, and AI-powered detection before a transaction is signed, Ledger and Cyvers are together setting a new standard for safety in crypto.

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For more information on how you can utilize the Preemptive Threat Interceptor to secure your assets, contact the Cyvers team.

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