Crypto Security Guide: Protect Your Funds

Crypto security guide showing wallet protection, strong passwords, 2FA and safe signing

Quick answer: how do you keep crypto secure?

Crypto security is mainly about protecting three things: your accounts, your wallet recovery information and the transactions you approve. Use strong unique passwords, enable strong two-factor authentication, protect your email and devices, keep seed phrases offline, verify websites before connecting a wallet, and read every signing request before approving it.

The most important habit is simple: do not rush. Many crypto losses happen because someone is pressured into clicking a link, sharing a secret or approving a transaction they do not understand.

If you are still learning what private keys and seed phrases are, read our crypto wallet guide first.

Why crypto security is different

Traditional financial services often have account-recovery teams, fraud departments and payment-reversal processes. Public blockchain transactions can work differently. If you authorise a transaction from a self-custody wallet, there may be no central party able to reverse it later.

That makes personal security unusually important. A technically secure blockchain cannot protect you if a scammer persuades you to reveal your recovery phrase or sign a malicious transaction.

Security is therefore not a single product you buy. It is a set of habits that reduce the number of ways somebody can reach your funds.

1. Protect your recovery phrase and private keys

Your recovery phrase can be the master backup for a self-custody wallet. Anyone who obtains it may be able to restore the wallet elsewhere and control the assets.

Keep it private and offline. Avoid storing it in screenshots, ordinary cloud notes, email drafts or messaging apps. Do not type it into a website because someone claiming to be support has asked you to “verify” the wallet.

Private keys deserve the same treatment. You should not need to send a private key to another person for normal support or troubleshooting.

Create a backup you can actually recover from

A secure backup is useless if it is incomplete, illegible or stored somewhere you cannot later access. Check the recovery words carefully when the wallet is created and store them somewhere protected from theft, fire and accidental disposal.

For larger balances, consider whether multiple secure physical backups or a dedicated metal backup are appropriate. The goal is resilience without creating unnecessary extra copies that other people can find.

2. Secure your email account

Your email is often the recovery channel for exchanges, trading platforms and other crypto services. If an attacker controls it, they may be able to reset passwords or intercept security messages.

Use a unique password, strong multi-factor authentication and review the account’s recovery methods. Remove old phone numbers or email addresses you no longer control.

Where supported, passkeys or hardware security keys can provide stronger protection than a password alone.

3. Use strong authentication on exchanges and trading platforms

Do not reuse passwords between exchanges, email accounts and social media. A data breach at one unrelated service can expose reused credentials elsewhere.

Enable the strongest authentication method that is practical for you. Authenticator apps, passkeys and hardware security keys can provide additional protection. SMS is better than having no second factor, but phone numbers can be targeted through SIM-swap attacks.

Some exchanges offer withdrawal-address allowlists or delays after security settings change. Those features can add useful friction if an account is compromised.

4. Keep your devices clean and updated

The phone or computer used for crypto is part of your security model. Keep the operating system, browser and wallet software updated. Remove extensions and applications you no longer use.

Be cautious with cracked software, unknown browser extensions and downloads from unofficial sources. Malware can steal credentials, alter clipboard contents or interfere with wallet activity.

Use a strong device passcode and enable automatic locking. If you routinely handle meaningful amounts of crypto, consider using a separate browser profile or dedicated device for financial activity rather than mixing it with experimental downloads and casual browsing.

5. Verify links instead of trusting them

Scammers frequently copy the branding of wallets, exchanges and crypto tools. A fake page can look almost identical to the real one.

Use official websites and trusted bookmarks. Check the domain spelling before logging in or connecting a wallet. Be particularly careful with links sent through Telegram, Discord, X, email or direct messages.

A verified-looking social media account is not proof that a link is safe. Accounts can be compromised, impersonated or used to promote malicious sites.

6. Understand wallet connections and transaction signatures

Connecting a wallet to a website and signing a transaction are not necessarily the same thing. A connection may simply allow the site to see your public address, while a transaction can authorise an on-chain action.

Read the wallet prompt before approving anything. Check the site, the asset, the amount, the network and the action being requested.

If the wallet shows a signing request you do not understand, reject it and investigate first. A legitimate opportunity is not worth approving a transaction blindly.

7. Separate long-term funds from active trading funds

One of the most useful security habits is wallet separation.

You might keep long-term holdings in a wallet that rarely connects to applications, while using a separate wallet with a smaller balance for trading, minting or trying new protocols.

This does not eliminate risk, but it limits how much is exposed if an active wallet signs something malicious.

A similar principle applies to exchange accounts: avoid leaving more on a platform than you need for the activity you are actually doing if self-custody is suitable for you.

8. Use hardware wallets appropriately

A hardware wallet can keep private-key operations on a dedicated device and can reduce some risks associated with malware on a general-purpose computer.

It is not a magic shield. If you deliberately confirm a malicious transaction on the device, the hardware wallet may faithfully sign it. You still need to verify addresses and understand what you are approving.

For setup guidance, see our hardware wallet setup guide.

9. Check addresses before sending

Crypto addresses are long and easy to misread. Copy and paste them, then compare the beginning and end with the destination you intended.

For a new address or network, send a small test transaction first. Confirm that it arrives before sending a larger amount.

Be aware of address-poisoning tactics, where an attacker tries to place a similar-looking address in your transaction history so you accidentally copy the wrong one later. Do not rely only on recent-history entries.

10. Learn how token approvals work

On smart-contract networks, decentralised applications may request permission to spend certain tokens from your wallet. Some approvals can remain active after you finish using the application.

Review what you are approving and avoid granting broader permissions than necessary where the wallet or application gives you a choice.

Periodically reviewing old approvals can reduce unnecessary exposure, especially if you experiment with many applications.

11. Treat support messages as a security risk

Crypto support scams are common because users often seek help publicly when a transaction goes wrong.

If you post a problem on social media, expect impersonators to contact you. Genuine support should not require your seed phrase, private key or a transfer of funds to “verify” your wallet.

Navigate to the official support site yourself rather than trusting someone who contacts you first.

12. Be sceptical of urgency and guaranteed returns

Security is not only technical. Scammers use pressure, greed and fear to make people bypass their normal checks.

Common pressure tactics include:

“Your wallet will be suspended unless you act now.”
“Connect immediately to claim the airdrop.”
“Send funds first to unlock your withdrawal.”
“Guaranteed returns with no risk.”
“You have only a few minutes before the opportunity closes.”

When urgency appears, slow down rather than speed up.

13. Keep your crypto activity private where sensible

You do not need to tell strangers how much cryptocurrency you hold, where it is stored or which security methods you use.

Public wallet addresses can reveal transaction history and balances, so consider the privacy implications before linking an address publicly to your identity.

Physical security matters too. A perfect password does not help if someone can easily access your unlocked device or written recovery phrase.

What to do before trying a new crypto tool

Verify the official website.
Check whether the tool has a genuine history and documentation.
Understand what wallet permissions it needs.
Use a separate wallet if the activity is higher risk.
Start with a small amount.
Check fees and network support.
Know how to revoke access or disconnect afterwards where relevant.

This process is especially important before using trading bots, decentralised exchanges and newly launched applications.

What to do if you think your wallet has been compromised

Act quickly, but avoid panicking into another mistake.

If you believe only an account password has been exposed, change it from a trusted device and secure the linked email and authentication methods.

If a self-custody recovery phrase or private key has been exposed, treat the wallet as compromised. If it is safe to do so, move remaining assets to a newly created secure wallet using a trusted device. Do not reuse the exposed recovery phrase.

If you approved a suspicious smart contract, review and revoke relevant token approvals where possible. Keep in mind that revoking an approval cannot reverse funds that have already been transferred.

For more scam-specific guidance, read How to Avoid Crypto Scams & Phishing.

Simple crypto security checklist

Unique passwords for email, exchanges and trading platforms.
Strong two-factor authentication or passkeys where available.
Recovery phrases stored securely offline.
No private keys or seed phrases shared with anyone.
Official websites bookmarked and verified.
Devices and wallets kept updated.
Separate active and long-term wallets where useful.
Small test transactions for new addresses.
Every signing request read before approval.
No decisions made because someone is creating artificial urgency.

Frequently asked questions

Can a hardware wallet be hacked?

No security product is perfect. Hardware wallets can reduce certain attack surfaces, but users can still lose funds through fake recovery processes, malicious transactions, poor backups or compromised supply chains. Buy from trusted sources and follow the manufacturer’s official setup instructions.

Should I keep my seed phrase on my phone?

For a traditional recovery phrase, offline storage is generally safer than keeping an ordinary screenshot or note on an internet-connected phone.

Is two-factor authentication enough?

No. It protects an account login but does not protect a self-custody wallet from a leaked seed phrase or a malicious transaction you approve yourself.

Can I recover crypto sent to a scammer?

Often there is no simple reversal mechanism. Recovery depends on the circumstances and should never be assumed. Be cautious of “recovery experts” who demand more money upfront, as victims are frequently targeted again.

Official crypto security resources

For additional guidance on protecting yourself and your crypto, these official and specialist security resources provide further information on scams, wallet security and safe crypto practices.

• FCA — Crypto investment scams
• Coinbase — How to keep your crypto secure

What to learn next

Continue with our crypto scams and phishing guide to learn the specific tactics attackers use.

If you are moving into self-custody, also read How to Set Up & Fund Your Crypto Wallet.

For the complete learning sequence, use the Simply Blockchain Start Here roadmap.

Educational disclaimer

This guide is general educational information, not personalised financial or cybersecurity advice. Security risks change over time. Verify important instructions through official sources and use professional help where appropriate.

Security Learning Path

Continue through the Simply Blockchain security library with the guides most relevant to this topic.

Crypto Security: Protect Your Funds Like a Pro