Crypto Security Checklist

Security note

TheCoinfo does not ask for seed phrases or private keys. Never enter your recovery phrase on any website. Verify URLs before connecting wallets. This page is educational only and cannot remove every risk. Some tools below include affiliate links, clearly marked, and TheCoinfo may earn a commission at no extra cost to you.

Quick security routine

• Review connected apps.
• Revoke unnecessary approvals.
• Check exchange login history.
• Update bookmarks for important websites.
• Verify hardware wallet firmware from official sources only.

For approval managers and on-chain research resources, browse the Crypto Tools Directory. Apply this checklist before participating in anything from the Airdrops Watchlist.

Read the hardware wallet research

For a deeper comparison of signing devices, read our Ledger security review, Ledger vs Trezor comparison, Tangem vs Ledger comparison and Ledger Nano S Plus vs Nano X comparison. Start with our research method to understand how we separate verification from promotion. These articles focus on recovery, transaction verification and the responsibilities a hardware wallet does not remove.

What to do after a suspicious interaction

Stop signing first. If you connected a wallet to a suspicious site, disconnect it and review the connected applications. If you approved token spending, use a trusted approval manager to inspect and revoke the permission. If you signed a transaction or shared a recovery phrase, treat the wallet as potentially compromised and move assets to a newly created wallet only after checking the situation carefully.

Do not search for “support” through unsolicited messages and do not follow recovery instructions from a direct message. Use the provider’s official domain, preserve safe evidence such as the URL and transaction hash, and avoid publishing private information while asking for help.

Red flags

• Guaranteed rewards.
• Urgent countdowns that pressure you to act.
• Requests for your seed phrase.
• Unknown downloads or browser extensions.
• Fake support DMs.
• Copied domains with small spelling changes.

A practical threat model

Security decisions become clearer when you name the asset, the action and the likely attacker. Protecting a long-term recovery phrase is different from protecting a browser wallet used for experiments. A hardware signer can reduce exposure to some remote malware, while a password manager can reduce reused credentials; neither can make an unclear transaction safe. Match the control to the failure mode rather than collecting tools without a routine.

Separate remote compromise, phishing, approval risk, device loss and recovery failure. An attacker who changes a destination on a computer is using a different path from someone who obtains a written backup. The response differs too: stop signing and inspect the request in the first case; treat the wallet as compromised and move to new control in the second. If you cannot identify which path is involved, stop adding activity until you can.

Keep important wallets away from routine experiments. Use a dedicated browser profile or wallet for unfamiliar applications, limit the value exposed and review connected applications after use. This does not make a risky application trustworthy; it limits the consequences of a mistake.

Before you connect, sign or send

1. Reach the provider through a bookmarked or independently verified official domain.
2. Identify whether the request is a connection, message signature, approval or transaction.
3. Check the network, destination, amount, fee and contract action in the trusted signing interface.
4. Use the smallest account and amount needed for an experiment.
5. Save safe evidence such as the URL, timestamp and transaction hash, never secret material.
6. Revoke unnecessary permissions and disconnect applications after the review.

Do not let familiarity replace inspection. A known brand can have a copied login page, and a genuine application can present a transaction you did not intend. The final decision belongs to the person who understands what is being authorized.

Recovery is part of security

A security plan is incomplete if it only covers the normal day. Decide how you would recover after losing a phone, hardware wallet or password. Keep recovery material offline and separate from the device it restores. Do not photograph it, place it in cloud notes or provide it to a support account. A backup that is convenient to share is usually too exposed; a backup no one can locate or understand is not useful either.

Test procedures with a small account before relying on them. Record public addresses and account purposes separately from private secrets so that you can recognize the expected result without turning the record into a key. Review the plan after moving home, changing devices or adding a trusted person.

For deeper hardware-wallet trade-offs, use the Ledger vs Trezor comparison and the Ledger safety review. They explain what device isolation helps with and what remains the user’s responsibility.

Security checks for exchanges and accounts

Wallet security is only one part of the account perimeter. For an exchange or research service, use a unique password, enable the strongest available second factor and save recovery codes offline. Prefer a hardware security key where the service supports it. Review active sessions, API keys, withdrawal addresses and email forwarding rules after signing in from a new device.

Separate permissions by purpose. An API key used for read-only portfolio data should not have trading or withdrawal rights. Remove old keys, browser sessions and connected applications that no longer have a clear reason to exist. Treat an unexpected password-reset message or login alert as a prompt to open the service through a known bookmark, not as a reason to click the message link.

When a service asks for identity documents, understand why they are required, where they are stored and whether the account can be closed later. Do not send documents or credentials to support contacts reached through social-media messages. Preserve the official ticket number and verify the domain independently.

Make the safe path easy to repeat

Good security is a routine that still works when you are tired or distracted. Keep a short list of official domains, the purpose of each wallet and the permissions each account should have. Review it after installing a new browser extension, changing a phone, joining a new protocol or receiving an unexpected message. The aim is not to inspect every detail every minute; it is to make unusual requests visible.

Use a pause point before irreversible actions. Read the full signing request in the hardware wallet or trusted wallet interface, compare the destination with a known record and ask whether the action matches the task you intended to perform. If the interface hides the contract method, shows an unfamiliar spender or asks for a broader approval than necessary, cancel and investigate through official documentation.

Plan for mistakes without panicking. Disconnecting a site does not reverse a transaction, and revoking an approval does not recover assets already transferred. Preserve the transaction hash and timestamp, secure remaining accounts from a clean device and contact the provider through a verified channel. Never pay a stranger who promises recovery and never provide a seed phrase as proof of ownership.

Sources and review limits

By TheCoinfo editorial team · Reviewed September 11, 2026.

This checklist is an editorial guide, not a guarantee that a wallet, exchange, application or transaction is safe. It was reviewed against the Ledger security overview, Trezor security documentation and the Etherscan Token Approval Checker. Product features, supported assets, threats and provider policies can change; check the current official documentation before acting.