Secure Crypto Custody Integration: Institutional-Grade Security for Your Digital Assets
Launch, manage, and scale your digital asset offerings with a bespoke custody framework built for unparalleled security, compliance, and control.
We engineer the fortress your assets deserve, so you can focus on growth.
TRUSTED BY INDUSTRY LEADERS AND INNOVATIVE STARTUPS
From Aspiration to Secure Reality
Entering the digital asset space is no longer optional, but the stakes have never been higher. A single security flaw can lead to catastrophic losses, regulatory penalties, and irreparable brand damage. Off-the-shelf custody solutions offer speed but force you into a rigid model, stifling innovation and sacrificing control. We bridge the gap. Errna provides bespoke crypto custody integration, combining the agility of a custom build with the battle-tested security of institutional-grade solutions. We empower you to define your own rules, create unique customer experiences, and build a digital asset ecosystem founded on absolute trust.
Why Partner with Errna for Custody Integration?
We go beyond simple integration. We build strategic, secure, and future-proof custody infrastructure that becomes your competitive advantage.
Uncompromising Security
Our security-first approach integrates MPC, HSMs, and multi-layer threat modeling to create a digital fortress around your assets, protecting you and your users from internal and external threats.
Tailored Architecture
Your business is unique. We design and build custom policy engines and workflows that match your specific operational, compliance, and user experience requirements perfectly.
Accelerated Time-to-Market
Leverage our proven frameworks, pre-built modules, and expert integration teams to launch your secure custody solution in a fraction of the time it would take to build from scratch.
Scalability by Design
Built on cloud-native principles, our solutions are engineered to handle exponential growth in users, assets, and transaction volume without compromising performance or security.
Regulatory Navigation
We turn compliance into a strength. Our integrations include robust KYC/AML workflows and Travel Rule solutions, helping you navigate the complex global regulatory landscape with confidence.
Seamless API Integration
Our well-documented REST and WebSocket APIs ensure a smooth, efficient, and secure integration process with your existing platforms and applications.
Future-Proof Solutions
We build for tomorrow's needs, ensuring your custody infrastructure can easily adapt to support new assets, blockchains, and DeFi protocols as the Web3 ecosystem evolves.
Dedicated Expert Support
From initial design to ongoing maintenance, you get direct access to our team of custody architects and blockchain security experts, ensuring your system remains secure and optimized.
True Partnership
We act as an extension of your team. We invest in understanding your long-term vision to build a custody solution that not only secures assets but also enables new revenue streams.
Our Comprehensive Custody Integration Services
We provide an end-to-end suite of services to design, build, and maintain a world-class digital asset custody solution. Our modular approach allows you to select the specific components you need or engage us for a complete turnkey platform.
Multi-Party Computation (MPC) Wallet Integration
We eliminate the single point of failure associated with private keys by implementing cutting-edge MPC technology. Key shares are distributed across multiple parties and devices, requiring consensus for any transaction. This provides the operational flexibility of a hot wallet with security that rivals cold storage.
Key Outcomes
- Eliminates single-point-of-failure risk from private key exposure.
- Enables secure, policy-driven automation of high-volume transactions.
- Enhances operational security without sacrificing speed or accessibility.
Hardware Security Module (HSM) & Cold Storage Solutions
For the highest level of asset protection, we integrate FIPS 140-2 Level 3+ certified HSMs and design robust, geographically distributed cold storage architectures. We establish ironclad operational procedures for key generation, storage, and access, ensuring your long-term holdings are impervious to online threats.
Key Outcomes
- Achieves the highest level of cryptographic key protection available.
- Provides a physically air-gapped environment for ultimate asset security.
- Builds institutional and investor confidence with verifiable security measures.
Custom Digital Asset Policy Engine
Move beyond simple access controls. We build sophisticated, programmable policy engines that enforce your unique business rules at the transaction level. Define granular policies for withdrawal limits, address whitelisting, multi-user approvals, and time-locks to automate security and compliance.
Key Outcomes
- Automates complex approval workflows, reducing manual overhead and error.
- Enforces security and compliance rules before transactions are ever signed.
- Provides a flexible framework to adapt to new threats and business needs.
KYC/AML & Travel Rule Compliance Integration
We integrate leading identity verification and transaction monitoring solutions directly into your custody workflow. Our systems help you meet stringent global regulatory requirements, including FATF's Travel Rule, by automating data collection, risk scoring, and reporting, turning compliance from a burden into a streamlined process.
Key Outcomes
- Automates regulatory compliance to reduce operational risk and overhead.
- Provides a clear, auditable trail for regulators and financial partners.
- Protects your platform from illicit activities and reputational damage.
Multi-Chain & Multi-Asset Support
The future is multi-chain. We build custody infrastructure that is blockchain-agnostic, allowing you to seamlessly add support for new cryptocurrencies, stablecoins, and token standards (e.g., ERC-20, BEP-20, SPL) as your business expands. Our unified API layer simplifies management across diverse digital assets.
Key Outcomes
- Rapidly expand your supported asset offerings to meet customer demand.
- Manage all digital assets through a single, consistent integration point.
- Future-proofs your platform for the evolving, cross-chain ecosystem.
Staking & DeFi Protocol Integration
Unlock new revenue streams by securely integrating staking, lending, and other DeFi protocols directly into your custody solution. We architect secure interaction layers that allow you and your users to participate in yield-generating activities without ever compromising the security of the underlying assets.
Key Outcomes
- Generate new, recurring revenue from custodied assets.
- Increase customer retention by offering in-demand DeFi services.
- Mitigates the security risks associated with direct smart contract interaction.
NFT & Tokenized Asset Custody
Digital ownership extends beyond fungible tokens. We provide specialized custody solutions for non-fungible tokens (NFTs) and other tokenized real-world assets. Our infrastructure securely stores metadata and ensures the unique properties and ownership rights of each token are preserved and transferable.
Key Outcomes
- Securely manage high-value, unique digital assets for your users.
- Enable new business models in gaming, art, real estate, and more.
- Provides a robust foundation for building compliant marketplaces and exchanges.
Comprehensive REST & WebSocket APIs
Our philosophy is to provide developers with powerful, flexible, and easy-to-use tools. We deliver a comprehensive suite of well-documented APIs for wallet creation, transaction management, policy configuration, and real-time balance updates, enabling seamless integration and rapid product development.
Key Outcomes
- Reduces development time and integration complexity for your team.
- Enables the creation of rich, real-time user experiences.
- Provides granular control over every aspect of the custody infrastructure.
Transaction Monitoring & Risk Analysis
Proactively identify and mitigate threats with real-time transaction monitoring. We integrate powerful analytics tools that screen transactions against risk parameters, identify suspicious patterns, and flag potential fraud or money laundering activities before they can impact your platform.
Key Outcomes
- Proactively detects and prevents fraudulent transactions.
- Strengthens your AML and CFT compliance programs.
- Provides valuable insights into user behavior and platform activity.
User & Role-Based Access Control (RBAC)
Implement the principle of least privilege across your organization. We build granular RBAC systems that allow you to define specific permissions for different user roles—from administrators and finance teams to customer support—ensuring users can only access the information and perform the actions necessary for their jobs.
Key Outcomes
- Significantly reduces the risk of internal fraud and human error.
- Simplifies user management and improves operational security.
- Creates a clear and auditable log of all actions performed by users.
Disaster Recovery & Backup Solutions
Prepare for the unexpected. We design and implement comprehensive disaster recovery plans and secure backup solutions for all critical components of your custody infrastructure, including key shares, databases, and policy configurations. This ensures business continuity and rapid recovery in the event of a system failure or catastrophic event.
Key Outcomes
- Ensures the ability to recover funds and operations in a crisis.
- Minimizes downtime and potential financial losses.
- Provides peace of mind for you, your stakeholders, and your customers.
Independent Security & Smart Contract Audits
Trust, but verify. We facilitate and manage rigorous, independent third-party security audits and penetration tests of the entire custody infrastructure. For DeFi integrations, we ensure all interacting smart contracts undergo thorough audits to identify and remediate potential vulnerabilities before deployment.
Key Outcomes
- Provides independent validation of your platform's security posture.
- Identifies and mitigates vulnerabilities before they can be exploited.
- Builds significant trust with institutional clients and partners.
Insurance & Asset Protection Advisory
A comprehensive security strategy includes a robust insurance policy. We leverage our industry partnerships to help you navigate the complex crypto insurance market, connecting you with providers of specie, crime, and D&O policies to secure coverage that protects your company and your clients' assets against theft and loss.
Key Outcomes
- Adds a critical financial backstop against unforeseen events.
- Meets a key due diligence requirement for institutional investors.
- Dramatically enhances the trust and credibility of your platform.
Wallet-as-a-Service (WaaS) Platform Development
Empower other businesses to build on your infrastructure. We can extend your core custody solution into a full-featured WaaS platform, allowing you to offer secure wallet creation and management APIs to third-party developers, creating a powerful new B2B revenue stream and ecosystem.
Key Outcomes
- Creates a new, highly scalable B2B revenue model.
- Positions your company as a foundational infrastructure provider in the space.
- Drives ecosystem growth and adoption around your core platform.
Gas Fee & Transaction Optimization
High transaction fees can erode profits and create poor user experiences. We implement advanced strategies like transaction batching, gas price prediction algorithms, and Layer 2 integrations to significantly reduce the operational costs associated with on-chain transactions, saving you money and improving efficiency.
Key Outcomes
- Dramatically reduces operational expenditure on network fees.
- Improves the speed and reliability of transaction processing.
- Enables competitive pricing and better margins for your services.
Our Secure Integration Methodology
We follow a rigorous, defense-in-depth process to ensure your custody solution is secure, compliant, and perfectly aligned with your business goals from day one.
1. Discovery & Threat Modeling
We begin with a deep dive into your business objectives, operational workflows, and regulatory requirements. Together, we conduct a thorough threat modeling exercise to identify potential attack vectors and define the core security posture for your unique use case.
2. Architecture & Policy Design
Based on the discovery phase, our architects design a bespoke custody solution, selecting the optimal mix of MPC, HSM, and cold storage. We work with you to define the granular rules for your custom policy engine, ensuring security and compliance are built into the foundation.
3. Secure Development & Integration
Our expert developers build the solution following secure coding best practices (OWASP). We focus on creating clean, well-documented APIs and SDKs to ensure a smooth and secure integration with your existing technology stack.
4. Rigorous Testing & Audits
The system undergoes multiple layers of testing, including unit, integration, and performance testing. We then engage top-tier, independent security firms to conduct comprehensive penetration testing and code audits to provide third-party validation of the system's integrity.
5. Deployment & Ongoing Support
We manage the secure deployment of the infrastructure and provide comprehensive training for your team. Post-launch, we offer ongoing support, maintenance, and security monitoring to ensure your custody solution remains optimized and protected against emerging threats.
An Impenetrable, Multi-Layered Security Architecture
Our approach to security is holistic, combining cutting-edge technology with rigorous processes to protect assets at every level.
Defense in Depth
We don't rely on a single security measure. Our architecture is a series of overlapping, complementary layers that ensure if one control fails, others are in place to prevent a breach.
- Cryptographic Layer: At the core, we use MPC and/or HSMs to ensure private keys are never a single point of failure. All sensitive data is encrypted both in transit and at rest.
- Policy Enforcement Layer: Your custom policy engine acts as a programmable gatekeeper, automatically enforcing business rules, transaction limits, and approval workflows before any transaction can be initiated.
- Application Layer: Our code is built on secure development principles, protecting against common vulnerabilities. We implement strict role-based access control (RBAC) to limit internal threats.
- Infrastructure Layer: We deploy on secure, hardened cloud infrastructure with continuous monitoring, intrusion detection systems, and robust disaster recovery protocols.
- Operational Layer: Technology is only part of the solution. We help you establish secure operational procedures, including multi-user approvals for critical actions and regular security training.
Proven Success in Digital Asset Security
We don't just talk about security and scalability; we deliver it. Explore how we've helped clients launch and secure their digital asset operations.
Challenge: Scaling a Retail Exchange Securely
ScaleUp Crypto, a rapidly growing cryptocurrency exchange, was facing significant operational bottlenecks. Their existing hot/cold wallet system was manually intensive, slow, and presented scaling challenges. They needed a solution that could support millions of user wallets and high transaction throughput without compromising on security.
Key Challenges:
- Inability to automate mass payouts and user withdrawals securely.
- High operational overhead managing a complex mix of hot and cold wallets.
- Security concerns around a single hot wallet private key.
- Difficulty in adding new blockchain assets quickly.
Our Solution:
We designed and integrated a custom custody platform based on Multi-Party Computation (MPC) technology.
- Implemented an MPC-based wallet system to eliminate the single point of failure for private keys.
- Developed a custom policy engine to automate withdrawal approvals based on predefined risk parameters.
- Created a unified API to manage wallets across multiple blockchains (Bitcoin, Ethereum, and Solana).
- Established a secure, scalable cloud infrastructure on AWS to support future growth.
Challenge: Launching a Compliant Institutional Crypto Fund
Digital Horizon Capital wanted to launch a new fund focused on digital assets. To attract institutional investors and family offices, they needed a custody solution that offered the highest level of security, was fully compliant with financial regulations, and provided a clear, auditable trail for all operations.
Key Challenges:
- Meeting stringent due diligence requirements from institutional LPs.
- Ensuring compliance with KYC/AML and Travel Rule regulations.
- Establishing a robust multi-user approval process to prevent unauthorized actions.
- Securing comprehensive insurance coverage for custodied assets.
Our Solution:
We built a defense-in-depth custody solution combining HSM-protected cold storage with a secure MPC-based operational wallet.
- Integrated a FIPS 140-2 Level 3 HSM for secure key generation and storage in a cold environment.
- Built a custom policy engine requiring a "4-of-6" multi-user approval for any movement of funds.
- Integrated Chainalysis for real-time transaction monitoring and AML compliance.
- Provided comprehensive documentation of the security architecture, which was instrumental in securing a multi-million dollar insurance policy.
Challenge: Securely Managing Millions of In-Game NFTs
MetaRealms, a Web3 gaming company, was preparing to launch their flagship title where every in-game item was an NFT owned by the player. They needed a highly scalable, low-cost Wallet-as-a-Service (WaaS) backend that could instantly create wallets for new players and securely manage millions of NFTs and in-game currency transactions.
Key Challenges:
- Creating and managing wallets for potentially millions of non-crypto-native users.
- High gas fees associated with minting and transferring a large volume of NFTs.
- Ensuring fast API response times to not impact the gaming experience.
- Protecting the company's treasury and un-minted assets from attack.
Our Solution:
We developed a custom, high-performance WaaS platform tailored for the gaming use case.
- Built a scalable wallet creation service capable of handling thousands of requests per second.
- Implemented transaction batching and gas optimization techniques that drastically reduced on-chain costs.
- Utilized an MPC architecture to secure the platform's main treasury wallets.
- Provided a simple, high-performance API for the game client to interact with the wallet infrastructure, abstracting away blockchain complexity.
Technology & Tools We Master
We leverage a modern, robust technology stack to build secure and scalable custody solutions.
What Our Clients Say
"The security and compliance layers Errna built are the bedrock of our platform. We couldn't have attracted institutional clients without their expertise. They are more than vendors; they are true security partners."
"As a CTO, I was deeply impressed by their technical proficiency and secure development process. The MPC integration was seamless, and their API is robust and well-documented. It saved my team months of work."
"Navigating the regulatory landscape was our biggest fear. Errna's team not only integrated the necessary compliance tools but also provided strategic guidance that was invaluable. They are experts in both tech and regulation."
"The ability to define our own transaction policies was a game-changer. It allowed us to automate so much of our treasury operations securely, freeing up our team to focus on growth initiatives."
"We needed to support multiple blockchains from day one. Errna delivered a solution that made adding new assets incredibly simple, all managed through one clean interface. Their architecture is truly forward-thinking."
"The entire process, from threat modeling to final deployment, was professional and transparent. We always knew where the project stood and felt confident in the security measures being implemented at every stage."
Frequently Asked Questions
While off-the-shelf providers offer speed, they lock you into their roadmap, fee structure, and operational model. A custom solution provides complete control. You can tailor the security policies, user experience, and supported assets to your exact business needs, creating a true competitive differentiator rather than relying on a commoditized service.
Multi-Party Computation (MPC) is a cryptographic technology that allows multiple parties to jointly compute a function (like signing a transaction) without ever revealing their individual secret inputs. For custody, this means a private key is replaced by multiple, independently held "key shares." A transaction can only be signed if a required threshold of parties combines their shares. This eliminates the single point of failure of a traditional private key, dramatically enhancing security.
The timeline varies based on complexity, but a typical project can range from 3 to 6 months. This includes discovery, architecture design, development, rigorous third-party auditing, and deployment. We prioritize a security-first approach over rushing to market, but our frameworks and expertise significantly accelerate the process compared to building from scratch.
Yes. While we are not an insurance broker, a key part of our service is preparing you for the insurance underwriting process. We provide the comprehensive documentation, architectural diagrams, and audit reports that insurers require to assess risk. We also leverage our industry network to connect you with reputable brokers specializing in digital asset insurance.
We offer a range of ongoing support and maintenance packages. This includes 24/7 monitoring, incident response, regular security updates, and support for adding new assets or features. We view the launch as the beginning of our partnership, ensuring your custody infrastructure remains secure, compliant, and optimized for the long term.
Ready to Build Your Fortress?
The security of your digital assets is the foundation of your business. Don't leave it to chance or one-size-fits-all solutions. Let's have a confidential discussion about your specific custody needs and architect a solution that provides absolute peace of mind.
Schedule Your Free Security Consultation