What is Crypto Custody and How Do Exchanges Keep Crypto Safe?

Echo Team
Echo Team
07/19/2025
Crypto Custody Security

Crypto custody isn’t a glamorous topic, but neither is explaining how your Bitcoin got hacked after a late-night hot wallet mishap.

In crypto, custody means one thing: who holds the keys, holds the power.

Crypto custody is the act of storing and securing your digital assets like Bitcoin, Ethereum, or stablecoins. Unlike a checking account, crypto custody isn’t just “logging into your bank.” It’s fundamentally about cryptographic keys. Lose those keys, and you won’t be able to access your assets on the blockchain. 

That’s why institutions, exchanges, and individual investors are putting serious thought (and capital) into custody solutions. 

But not all custody is created equal. There’s nuance: some prefer to hold their coins in cold wallets buried under a mountain, others trust regulated custodians with Swiss vault precision. 

This guide lays it all out: the what, why, and how of digital asset custody, and how Echo fits into that ecosystem with institution-grade security built for everyday users and pros alike.

What is Crypto Custody?

Crypto custody refers to the storage of crypto assets. More specifically, it’s about who holds the private keys that control those assets. “Holding the keys” is cryptospeak for owning the ability to move and manage your coins. 

Traditional asset custody involves banks, brokers, and clear documentation.

Digital asset custody takes different forms, ranging from individuals storing keys themselves (self-custody) to full-service institutional-grade platforms that keep your coins safe on your behalf. 

In the world of cryptocurrency exchanges, custody is handled with institutional-grade security. It offers multi-layered protection through multi-party computation (MPC), biometric authentication, and real-time monitoring. 

If you forget your password, you’re not out of luck; there are recovery mechanisms. 

On the other hand, self-custody puts the entire burden on the individual. With great power (to self-custody) comes great risk (of irreversible screw-ups). Unlike traditional finance, there’s no “forgot password” button on the blockchain.

The Types of Crypto Custody

Self-custody means you are the bank. You manage your own wallets, usually with hardware wallets like Ledger, Trezor, or cold storage solutions. This offers total control, no one can access your coins or freeze your account. But control comes with serious responsibility. Losing your keys (and recovery phrases) is the crypto equivalent of burning cash.

Self-custody appeals to privacy advocates, DeFi power users, and anyone with trust issues, which is common and understandable in crypto. 

But the downside is real: user error, forgotten passphrases, and zero recourse in the event of loss.

In third-party custody, a platform, like an exchange, bank, or regulated crypto custodian, holds your crypto for you. It offloads security responsibilities to professionals who use advanced technologies: multi-sig, HSMs, and biometric access controls. 

How Institutions Secure Digital Assets

Institutions aren’t improvising with sticky notes and USB sticks. They use military-grade tech and obsessive controls to protect digital assets. 

Here’s how they typically do it.

Start with cold storage. This means keeping private keys offline, air-gapped from the internet, and immune to remote hacks. Most large custodians, like Coinbase Custody or BitGo, keep the majority (often 98%+) of user funds in cold wallets, only exposing a tiny amount to hot wallets for daily operations.

Then you’ve got multi-signature authorization. This requires multiple parties to approve any transaction. Think of it as a digital deadbolt with three keys: no single person can unlock the vault.

Hardware Security Modules (HSMs) are specialized machines that generate and store keys in tamper-resistant hardware. Banks use them. Crypto custodians use them. Even governments use them. Some institutions take it a step further with key sharding, splitting a private key into pieces and storing them in geographically separate locations.

From there, institutions implement access controls, such as biometric logins, whitelisted IP addresses, and hierarchy-based permissions. 

Think: the CFO approves transfers, but interns can’t even view balances.

Often, all of this is backed by insurance coverage and security audits. Real firms hire third-party professionals to test their systems under attack, and regulators increasingly require it. 

Add in compliance requirements (think KYC/AML) and you’ve got custody infrastructure built to satisfy both crypto degens and institutional compliance officers.

Final Thoughts: Secure Crypto Custody and What It Means for You

Custody has always been a key pillar of cryptocurrency, but as digital assets find a home in retirement funds, corporate treasuries, and the pockets of retail users, the demand for secure, compliant storage is sharper than ever.

Who holds the keys, holds the coins, and that’s not a responsibility anyone should take lightly. 

Whether you choose to hold your keys or trust a custodian comes down to your risk tolerance and technical fluency.

But here’s the reality: even the most privacy-focused user may want safe, fast access. Even the most institutional investor needs peace of mind that their assets are protected under regulatory-grade oversight.

We see secure digital asset custody developing from a binary choice (custodial vs. non-custodial) to a spectrum of hybrid models, like Echo’s, where users don’t have to compromise between security, usability, and trust.