Blockchain Security
Every-layer defence, from smart contracts to infrastructure.
Wallets, ledgers and smart contracts are all attack targets. UD defends every layer, from audits to 24/7 managed protection.
What is blockchain security
Blockchain security is end-to-end protection for blockchain applications and the infrastructure behind them. Any non-blockchain infrastructure can have vulnerabilities, and smart contracts themselves can hide serious flaws. A single incident can damage on-chain data, transactions and corporate reputation all at once.
The five layers of blockchain security
Blockchain risk spans many layers, and single-point protection isn't enough. UD reviews security as five layers, identifying risks from application to consensus and covering every one so there are no gaps.
UD's blockchain security services
Comprehensive security assessment and management for NFT projects and marketplaces, DeFi protocols, crypto exchanges, blockchain nodes and dApps, addressing every risk across the five layers.
Regular security assessment
Vulnerability scanning
Continuously scans apps and infrastructure to find vulnerabilities early.
UD vulnerability scanningPenetration testing
Pen-tests front-end apps and infrastructure before launch to lower attack risk.
UD penetration testingTechnical review
Smart-contract auditPre-launch must
A thorough review of contract code to find bugs, logic flaws and security holes, with fixes. An essential step before NFT and DeFi launches.
Front-end code review
Checks database and wallet-connection security, and proper key management, message signing and transaction sending.
24/7 managed blockchain security
Continuous monitoring across traditional network and blockchain technology, covering all five layers with specific measures from application to consensus.
Why choose UD
A Hong Kong blockchain pioneer since 2017
UD has served clients with blockchain and crypto since 2017, fluent in the full stack from nodes and smart contracts to dApps, reviewing risk from both an attacker's and a developer's perspective.
Every-layer, cross-chain coverage
From application to consensus layer, supporting both private and public chains, with strong tamper-resistance, security and transparency.
Assessment-to-fix loop
We don't just find vulnerabilities; we recommend concrete fixes to help you harden before launch.
Seamless with your infrastructure
If UD also hosts your nodes or infrastructure, we coordinate security management across both.
Free Consultation
Tell us your security needs
Describe your project type and security needs, and a UD blockchain security expert will assess them and recommend the right approach. Local certified team · responses in Hong Kong hours.
Common questions
How is UD different from a typical smart-contract audit firm?
Many audit firms only offer a one-off contract code review. UD offers a full-layer approach: beyond smart-contract audits, it covers front-end code review, penetration testing, vulnerability scanning and 24/7 managed protection across all five layers. More complete for projects that need ongoing protection rather than a single audit.
What does a smart-contract audit cover, and when should it run?
An audit thoroughly reviews contract code to find bugs, business-logic issues and security holes, and recommends fixes. Because a blockchain is immutable, a deployed contract is hard to change, so audit before going live, ideally throughout development.
Which chains and application types do you support?
UD supports both private and public chains, and provides security assessment and management for NFT projects and marketplaces, DeFi protocols, crypto exchanges, blockchain nodes and dApps. Confirm specific coverage with the team when you enquire.
How does pricing work?
Blockchain security is priced to project scope, complexity and whether ongoing management is needed, so quotes are custom. Send an enquiry and the team will assess your needs and propose a plan and price.
How does blockchain security relate to traditional cybersecurity?
Blockchain applications rely on both traditional infrastructure (servers, network, front end) and blockchain-specific elements (smart contracts, consensus). General penetration testing and vulnerability scanning are provided by UD Security, while blockchain-specific smart-contract audits are handled by this team.
Will you help fix vulnerabilities you find?
Yes. After finding vulnerabilities in an assessment, UD recommends concrete fixes to help you harden before launch. Whether UD carries out the fixes directly depends on the project and can be agreed when you enquire.
Before you launch,
get security right
Every-layer defence from smart contracts to infrastructure, run by a local certified team. Send an enquiry for a security assessment.