As concerns about inflation persist and negative interest rates loom, even the most conservative institutional investors—such as corporate treasurers—are exploring opportunities to invest surplus cash in digital assets.
According to Gartner, 5% of CFOs and senior finance executives planned to incorporate Bitcoin into their balance sheets by 2021. However, the existing digital asset infrastructure often falls short of meeting institutional requirements. Many custody solutions still struggle to guarantee both security and liquidity, let alone offer advanced financial tools for automated workflows, liquidity management, and comprehensive reporting.
As a result, corporate treasurers managing crypto assets often rely on a patchwork of tools. While combinations of hot and cold wallets are commonly used, they introduce operational risks and complicate reporting, requiring employees to spend hours consolidating data from disparate sources.
Institutional-grade cryptocurrency custody is generally implemented in one of three ways: self-custody, co-custody, or third-party custody.
Self-Custody: Full Control Over Digital Assets
Unlike institutional investors bound by custody regulations requiring qualified custodians, corporate treasurers can opt for self-custody—aligning with the original cypherpunk vision of financial sovereignty.
This approach is akin to storing physical gold in a private vault. With Bitcoin, holding the private key—the cryptographic code that confers ownership—means having complete control over the asset.
Single-Signature Wallets
Small businesses might use a single-signature hardware wallet for self-custody. The private key is stored on a secure USB-like device that can be plugged into a computer or mobile phone to sign transactions.
Advantages:
- Provides full control to an individual, allowing a CEO or treasurer to execute transactions quickly.
Disadvantages:
- Impractical for all but the smallest companies, as it requires one executive to participate in every transaction.
- Sharing a wallet among staff is cumbersome and eliminates accountability, as it’s difficult to track who authorized each transaction.
- Creates a single point of failure: if the key holder is unavailable, loses the key, or is hacked, funds can be permanently lost.
Multi-Signature Wallets
Most enterprises consider multi-signature wallets due to the security and flexibility limitations of single-signature setups.
If a single-signature wallet is like a vault with one key, a multi-signature wallet is like a safe that requires multiple keys (M) and a subset of those (N) to authorize a transaction.
A common configuration might require 2 out of 3 or 4 out of 5 signatures to approve a transaction.
Advantages:
- Allows tiered permission levels and distributed control among employees.
- Reduces reliance on any one individual.
Disadvantages:
- More signatures mean slower, costlier, and more complex transaction approvals.
- On-chain transactions can be slow during network congestion and incur high fees for simple operations.
- Still vulnerable to collusion or insider threats, especially when employees leave the organization.
- Inflexible: changing signing arrangements requires moving funds to a new wallet address.
- Limited number of possible signers (usually up to 15), making scalability a challenge.
- On-chain multi-signature transactions are publicly visible, potentially exposing sensitive business logic.
Co-Custody: Sharing Control with External Co-Signers
Co-custody involves delegating partial control to a third party that acts as a backup or active co-signer. This can be implemented using multi-signature setups or Multi-Party Computation (MPC) with Threshold Signature Schemes (TSS).
A typical co-custody arrangement might involve the owner retaining two private keys and entrusting a third to a semi-custodial service—reducing single points of failure.
On-Chain Co-Custody with Multi-Signature
In this model, a corporate treasurer might hold two of three private keys and assign the third to an external party.
Advantages:
- Improves operational security by distributing key management.
Disadvantages:
- Inherits all the drawbacks of multi-signature wallets.
- Introduces an additional trusted third party, expanding the attack surface.
Off-Chain Co-Custody with MPC-TSS
MPC with Threshold Signature Schemes (TSS) offers another method for co-custody. Unlike multi-signature, which operates on-chain, MPC-TSS moves the signing process off-chain. It uses distributed nodes, each holding a fragment of the private key, to collaboratively generate a single signature.
Advantages:
- Faster off-chain signing without relying on slow blockchain confirmations.
- No network fees for signature computation.
- Cross-chain compatibility using standard ECDSA algorithms.
- Enhanced privacy since signature arrangements aren’t visible on-chain.
Disadvantages:
- MPC solutions relying on centralized databases are vulnerable to hacks.
- If all nodes are controlled by one organization, assets may still be exposed to insider threats.
- Opaque software layers can undermine security and auditability.
- Limited ability to produce immutable audit logs.
Third-Party Custody: Entrusting Assets to a Custodian
Some organizations opt to fully delegate custody to a third party—similar to depositing gold with an insured custodian. This usually involves a multi-signature wallet controlled by the custodian.
Advantages:
- No technical expertise required from the asset owner.
Disadvantages:
- Relinquishing control to a third party contradicts key benefits of crypto, such as censorship resistance.
- Risk of asset freezes, seizures, or hacks.
- Commingled accounts may prevent transparent, on-chain verification.
- History of custodian failures, including in traditional finance.
- Fees can accumulate over time.
- Transfers and withdrawals are often slow and restricted to business hours.
A New Paradigm: Decentralized Custody for Decentralized Assets
A new generation of custody solutions is emerging, combining the benefits of self-custody with the security and efficiency of advanced cryptography.
These platforms use MPC and decentralized blockchain networks to distribute private keys without single points of failure. This allows corporate treasurers to mix and match self-custody, co-custody, and third-party custody—without trading security for accessibility.
👉 Explore advanced custody solutions
Benefits of Modern Custody Networks
- Instant Settlement: Enable real-time transactions across custodian, broker, and liquidity provider networks.
- Unified Dashboard: Monitor all positions, wallets, and accounts from a single interface.
- Treasury System Integration: Connect via open APIs to existing enterprise resource planning (ERP) and accounting systems.
- Delegated Permissions: Customize transaction approval workflows with flexible M-of-N signer structures.
- Immutable Audit Logs: All transactions are recorded on a Layer 2 blockchain for full transparency.
- Compliance Ready: Built-in messaging for regulations like the Travel Rule.
- Enhanced Security: Decentralized key management with hardware security modules and institutional-grade insurance.
Frequently Asked Questions
What is crypto custody?
Crypto custody refers to the safeguarding of cryptographic private keys that control digital assets. Solutions range from self-managed hardware wallets to institutional custodians offering insured storage.
Why do institutions use crypto custodians?
Institutions often prefer custodians to reduce operational risk, ensure regulatory compliance, and leverage professional security infrastructure and insurance coverage.
What is multi-signature custody?
Multi-signature custody requires multiple private keys to authorize a transaction. It distributes control among several parties to prevent single points of failure.
How does MPC differ from multi-signature?
MPC uses cryptographic techniques to generate signatures off-chain without ever reconstructing the full private key. It offers greater privacy, flexibility, and cross-chain compatibility compared to traditional on-chain multi-signature.
What are the risks of self-custody?
Self-custody requires meticulous security practices. Loss of private keys, phishing attacks, or physical damage to hardware can result in irreversible loss of funds.
Can I combine different custody methods?
Yes. Advanced platforms now allow organizations to design hybrid custody models—mixing self-custody, co-custody, and third-party services—tailored to their security and operational needs.