We help keep your DeFi protocol safe. We watch your internal logic, system upgrades, and external partners.
Smart contract architectureDesign patterns
Business logicEconomic models
Token mechanismsPermission control
Upgradeability and proxygovernance modules
Integration with oracles, bridges, and DeFi protocols
Testing coverage and deploymentOperational securityFirst, we look at your entire DApp to see what needs testing. This includes your frontend, backend, and how they talk to the blockchain. We will give you a price based on how many features your DApp has and how it is built. If you need to protect your secrets, we can sign a non-disclosure agreement (NDA) before we look at any code.
Mapping the DApp Audit
First, we look at your entire DApp to see what needs testing. This includes your frontend, backend, and how they talk to the blockchain. We will give you a price based on how many features your DApp has and how it is built. If you need to protect your secrets, we can sign a non-disclosure agreement (NDA) before we look at any code.
Formalizing the Plan
Next, we agree on the price and how the project will work. We will set a clear schedule with a firm start date and a final deadline. This lets everyone know when the DApp audit will be done. You can plan your launch with confidence.
Deep Security Testing
Our experts use advanced tools to scan your DApp for any weak spots. We don't just look at the code; we test how the whole application behaves. We will share what we find with you and discuss how to fix the problems. After you make changes, we will check them again to make sure your DApp is truly safe. For very big apps, we might repeat this process a few times.
Final Results and Support
Finally, you will receive an official security report signed by our team. It explains every risk we found and gives you clear steps to fix them. We also include advice on how to keep your DApp secure as you add new features. This report helps you show your users that your application is safe to use.
We use expert knowledge and our smart tools to ensure your DApp is safe, works well, and has no hidden bugs.
“BlockSec has shown remarkable professionalism in smart contract audits. Their expertise in blockchain and smart contract technology, along with a meticulous approach, ensures thorough identification and resolution of security risks. We highly commend their professionalism and anticipate continued collaboration.”
“It's been a fantastic experience collaborating with BlockSec. You have shown your professionalism in the audit field, especially on the smart contract side.”
“With a keen eye for detail, the team identify potential vulnerabilities and provide robust solutions, ensuring our contracts are secure and optimized. For anyone in need of expert smart contract auditing, I cannot recommend BlockSec highly enough.”
“The BlockSec team is very knowledgeable, punctual, responsive, and diligent during the entire audit process. We highly recommend BlockSec for any smart contract protocols who are seeking great value for money in the audit field.”
“I want to extend my sincerest appreciation to BlockSec for conducting a thorough audit of the Stratos project. Their meticulous approach and insightful feedback have significantly contributed to enhancing our project's security and reliability.”
“It's also worthwhile to look into trustworthy auditing companies like @BlockSecTeam. Such audit reports are a gold mine of knowledge ⛏️🕯️”
Our founders and auditors are top researchers who publish breakthrough security papers at the world's biggest academic conferences.
Our reports don't just list problems; they explain exactly what is wrong and give you simple, step-by-step instructions to fix them.
We secure billions of dollars in assets and are the trusted security partner for the biggest names in the Web3 space.
We don't leave you after the report is delivered; we help you fix issues, verify the changes, and monitor your project after launch.
~$39.5M Lost: Allbridge, Wanchain & More | BlockSec Weekly
During the week of July 20-26, 2026, 8 notable security incidents resulted in approximately $39.5M in total losses across Solana, Ethereum, BNB Chain, Arbitrum, Zilliqa, and Cardano. The highlighted Allbridge Core incident (~$1.65M) exposed a Solana input validation flaw where the same Pool account was accepted in both swap roles, with analysis reconstructed entirely from the deployed program binary. Other analyzed incidents include Wanchain (~$500K, flawed message encoding in a Cardano bridge validator), Zilliqa (~$400K, flawed nonce generation in a Ledger app since 2019), and Lien Finance (~$542K, flawed validation logic in bond exchange).
Top 10 "Awesome" Security Incidents in 2025
To help the community learn from what happened, BlockSec selected ten incidents that stood out most this year. These cases were chosen not only for the scale of loss, but also for the distinct techniques involved, the unexpected twists in execution, and the new or underexplored attack surfaces they revealed.
Newsletter - December 2025
In December 2025, the DeFi sector encountered three significant security incidents, resulting in total losses of approximately $19.7 million. Yearn Finance faced nearly $10 million in losses due to vulnerabilities in its yETH pool and legacy contracts. Trust Wallet suffered a malicious backdoor attack on its Chrome extension, leading to losses of about $7 million. Ribbon Finance experienced a loss of $2.7 million due to improper access controls.
