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Private Smart Contract Audits

In-depth, manual and AI-driven, expert smart contract audits

Private Smart Contract Audits

In the rapidly evolving landscape of blockchain technology, smart contracts have emerged as a revolutionary tool, transforming the way we conduct transactions and enforce agreements. These self-executing contracts with the terms of the agreement directly written into code are not only efficient but also eliminate the need for a middleman, making transactions transparent, traceable, and irreversible.

However, as powerful as smart contracts are, they are not immune to vulnerabilities. Given that they handle valuable assets and sensitive operations, even a minor bug or loophole can lead to significant losses. Furthermore, once a smart contract is deployed on the blockchain, it cannot be modified, making it crucial to ensure its security and efficiency before deployment.

Private Smart Contract Audit

That’s where Cryptosec comes in. We offer a comprehensive Smart Contract Audit service to ensure your contracts are secure, efficient, and reliable. We have extensive experience working with a multitude of blockchain projects across all different networks like BSC, Ethereum, Solana, Polygon, AVAX, as well as Hyperledger, Corda, and many others. We audit smart contracts in all languages, on all blockchains.

Our team of experienced auditors specializes in identifying vulnerabilities, inefficiencies, and bugs that could potentially compromise the integrity of your smart contracts. We correct application design issues, find errors and identify vulnerabilities by performing both a manual inspection and a suite of automated tests to ensure your code is mainnet-ready.

Our Approach to Private Smart Contract Audits

At Cryptosec, we offer a comprehensive Smart Contract Audit service to ensure your contracts are secure, efficient, and reliable. Our tried-and-tested audit process has been continually fine-tuned to maintain a track record of zero exploits, underscoring the reliability and effectiveness of our methods.

Some of the common steps in our smart contract audit process are outlined below. Please note that not all seps are included in all engagements. Whether or not to include some of the steps (e.g. Formal Verification) in a smart contract audit would depend on factors like the complexity of the contract, the potential risks involved, and the client’s requirements and budget.


The first step in our smart contract audit process is preparation. During this phase, we work closely with your team to understand the functionality and objectives of your smart contract. We review any documentation you provide, including the contract’s specifications, design patterns, and use cases. This helps us gain a thorough understanding of your contract’s intended behavior, which is crucial for the subsequent stages of the audit.

To ensure you gain the most from your audit, you should consider the following steps in preparation for the audit:

  • Clearly establish the functional requirements for your project.
  • Prepare a detailed technical description of your project.
  • Set up a development environment for the project.
  • Develop comprehensive unit tests.
  • Ensure that the code complies with best practices and security standards.

Automated Testing with Industry-Standard Tools

Once we have a solid understanding of your smart contract, we move on to automated testing. We use state-of-the-art tools and software to scan your contract’s code for common vulnerabilities and inefficiencies. This includes checking for reentrancy attacks, timestamp dependencies, transaction-ordering dependencies, and more. Automated testing allows us to quickly identify and address common issues, but it’s just the first layer of our audit process.

Some of the tools our team members have experience with include Mythril, MythX, Slither, Oyente, Solhint, Securify, HoneyBadger, Manticore, VeriSmart, and others.

Automated Assessment with In-House AI Tool

At Cryptosec, we’ve developed an advanced in-house AI tool specifically designed for smart contract audits. This tool performs an automated assessment of your smart contract, identifying potential vulnerabilities and inefficiencies that might be missed by standard automated testing. By incorporating AI into our audit process, we can provide a more thorough and accurate evaluation of your smart contract.

Manual Review

While automated testing is an essential part of our process, it’s not sufficient on its own. That’s why we follow it up with a thorough manual review of your contract’s code. Our experienced auditors meticulously examine your contract line by line, looking for complex vulnerabilities that automated tools might miss. It’s important to note that we always use multiple auditors to check any codebase. This includes checking for logic errors, contract interactions, and potential optimizations. The manual review also allows us to verify that your contract behaves as intended and aligns with its documentation.


Fuzzing is a sophisticated testing technique where we input a large amount of random data (“fuzz”) into your smart contract to see how it reacts. This helps us identify any unexpected or problematic behavior that might not be apparent under normal conditions. Fuzzing is particularly effective at uncovering edge cases that could potentially be exploited by malicious actors.

Formal Verification

Formal Verification is a process that mathematically proves or disproves the correctness of a smart contract with respect to a certain formal specification or property. It uses logical and mathematical methods to analyze a system and ensure it behaves as expected. The effort would involve creating a formal model of the smart contract’s behavior and then using automated tools to verify that the contract’s code matches this model. Any discrepancies could indicate potential vulnerabilities or bugs in the contract.

Formal Verification can provide a high degree of assurance that a smart contract behaves as intended and is free of certain classes of vulnerabilities. However, it’s important to note that Formal Verification is a complex and time-consuming process that requires a high level of expertise. It’s typically used for contracts where the potential risks or value at stake justify the additional effort and cost.

Analysis & Verification

This crucial stage of the audit process truly showcases the merits of our unique methodology. Until this point, our auditors have been conducting their examinations independently, allowing for unbiased scrutiny and in-depth exploration of the code from their respective perspectives. Now, these auditors come together for the first time, bringing their individual insights and discoveries into a joint discussion under the guidance of the lead auditor. We examine, converse about, and even argue over the identified issues in an open dialogue, fostering a more well-rounded understanding of your project’s potential vulnerabilities.

Report Preparation

After we’ve completed the automated testing, manual review, fuzzing, and analysis, we compile our findings into a detailed audit report. This report includes a summary of our findings, a description of any vulnerabilities or inefficiencies we identified, and recommendations for improving the security and efficiency of your smart contract. We prioritize the issues based on their severity to help you address the most critical ones first.

Review & Revision

Once you’ve had a chance to review our report and make the recommended changes, we conduct a final review of your smart contract to ensure all issues have been addressed. If necessary, we’ll repeat any of the previous steps to ensure your contract is as secure and efficient as possible.

Post-Audit Support

Our commitment to your smart contract’s security doesn’t end with the delivery of the audit report. We provide post-audit support to help you implement our recommendations and answer any questions you might have. Our goal is to ensure you’re fully confident in the security and efficiency of your smart contract.

Smart Contract Audit

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