Whether you are buying, storing, or investing in cryptocurrency, ensuring its security should always be your top priority. In the vast majority of cases, losing access to your coins and tokens is permanent.
If you trade on centralized exchanges, opt for platforms that adhere to Know Your Customer (KYC) and Anti-Money Laundering (AML) regulations. Peer-to-peer trading and audited decentralized exchanges also offer secure alternatives for transactions.
Multiple methods are available for safely storing your digital assets. You can keep cryptocurrencies in regulated exchanges, which is practical for beginners and active traders. However, you do not control the private keys in such cases.
Non-custodial wallets, where you manage your keys, provide enhanced security. An even safer option is to store keys offline using cold storage devices. In both scenarios, it's essential to keep your private keys secure and offline.
Using audited decentralized applications (DApps) boosts your security. Regularly review and revoke permissions granted to DApps that interact with your wallet.
Introduction
Self-sovereignty is a core concept in cryptocurrency—users act as their own bank. When you manage your funds properly, they can be more secure than money in a bank vault. However, poor security practices can lead to your digital wallet being emptied remotely.
Learning how to protect your digital tokens is a critical step in your crypto journey. Security isn’t just about storage. Many cryptocurrency holders interact with DApps in the decentralized finance (DeFi) ecosystem, so it’s also important to use your tokens safely.
Just as you wouldn’t entrust your money to an untrustworthy business, you shouldn’t trust random DApps with your tokens. The same applies to the exchanges where you buy and trade cryptocurrencies. This guide covers the best techniques to keep your crypto assets secure at all times.
Purchasing Cryptocurrency Safely
There are numerous avenues for purchasing cryptocurrency, including centralized exchanges, decentralized exchanges (DEXs), crypto ATMs, and peer-to-peer (P2P) platforms. Each option has its own advantages and drawbacks, and not all provide the same level of security. For most users, a reputable centralized exchange offers the best balance of simplicity and safety.
Choosing a Secure Exchange
Centralized exchanges like Binance implement regulatory measures, AML procedures, and KYC checks to enhance security. While early crypto exchanges had their issues, governments and operators have significantly improved the landscape.
Before using an exchange, you must transfer funds into its custodial wallets. Depending on your perspective, allowing the exchange to hold your tokens can offer a degree of protection. If you are new to wallet management or cryptocurrency in general, using an exchange’s wallet might be safer. It reduces the risk of accidentally locking yourself out of your wallet and losing access.
However, some individuals prefer to retain control over their funds. You may have heard the phrase “not your keys, not your coins.” If you don’t own the wallet, someone else could control your cryptocurrency. Refer to the storage section below for more details.
If you opt for a P2P service or a DEX, there are signs to watch for to improve security. When using a DEX, verify that its audit comes from a reliable source. We’ll discuss audits in more detail later. Binance, known for its security and reputation, also offers a decentralized exchange service.
For P2P transactions, ensure both buyers and sellers complete KYC verification. Ideally, the platform should offer escrow services. While escrow doesn’t eliminate risk entirely, it provides additional protection against scams for both parties.
Securing Your Account
Once you’ve chosen an exchange or trading method, follow standard best practices to secure your account. These measures are similar to those used for online banking or other sensitive accounts. Prevent unauthorized access to your account and funds by:
- Using a strong, unique password and changing it regularly. Avoid including personally identifiable information like your birthdate. Ensure passwords are long, include symbols, numbers, and both uppercase and lowercase letters.
- Enabling two-factor authentication (2FA). If your password is compromised, 2FA adds a second layer of protection using your mobile device, an authenticator app, or a YubiKey. You’ll need both your password and the 2FA method to log in.
- Being vigilant against phishing attempts and scams via email, social media, and private messages. Scammers often impersonate exchanges or trusted individuals to steal your funds. Avoid downloading software from untrusted sources, as it may contain malware.
For more detailed information on account security, read the guide on 7 Simple Steps to Secure Your Binance Account.
Storing Your Cryptocurrency Securely
After purchasing or trading cryptocurrency and securing your account, the next priority is storing it safely. If you don’t plan to leave your crypto on an exchange for trading, your only option is a wallet. Wallets differ in terms of private key ownership and internet connectivity. Your choice depends on the level of security you desire.
Understanding Private Keys
A private key is like a physical key that unlocks your cryptocurrency for use. Safeguarding your private key and ensuring secure access is the most crucial step in protecting your assets. It is a long string of numbers, virtually impossible to guess. For example, flipping a coin 256 times, with “1” for heads and “0” for tails, can generate a private key. Here’s one in compressed hexadecimal format (numbers 0-9 and letters a-f):
8b9929a7636a0bff73f2a19b1196327d2b7e151656ab2f515a4e1849f8a8f9ba
If you search for this string online, the results will likely only show this article (unless it has been copied elsewhere). This demonstrates the randomness of these keys and the improbability of anyone else having seen them.
The number of possible private keys is comparable to the number of atoms in the known universe. This is a fundamental security principle for cryptocurrencies like Bitcoin and Ethereum. Your tokens are secure because they are hidden in an unimaginably vast space.
If you’ve received funds, you’re probably familiar with public addresses, which also appear as random strings. Public keys are derived from private keys through encryption, and public addresses are generated from public keys via hashing.
While it’s easy to generate a public address from a private key, the reverse is virtually impossible. This is why you can share your public address on blogs or social media. Without the corresponding private key, no one can access the funds.
If you lose your private key, you lose access to your funds. If someone else obtains it, they can steal your assets. Therefore, protecting your private key from exposure is paramount.
Seed Phrases
Modern wallets are often hierarchical deterministic (HD) wallets, meaning they can manage billions of keys. You only need to remember a seed phrase—a series of human-readable words that generate these keys. For example:
strike sadness boss daring voice connect holiday vintage quantum pony stable genuine
Unless you intentionally use a single private key, you’ll be prompted to back up a seed phrase when creating a new wallet. In the following sections, “key” may refer interchangeably to a private key or a seed phrase.
Protecting Your Seed Phrase
Your 12-, 18-, or 24-word seed phrase is critical for security. Anyone with access to it can import your keys into their wallet and steal your funds. You might also have a JSON file or a standalone private key, which serves the same purpose. Follow these guidelines to manage your keys carefully:
- Avoid storing your seed phrase on internet-connected devices. If your device is infected with malware or compromised remotely, your seed phrase could be exposed.
- Offline storage is safer. Store your seed phrase physically or on offline devices. Even if you use cold storage (discussed later), keep a backup of your keys in case the device is damaged or lost.
- If storing physically, consider the materials and location. Writing the phrase on paper that could be destroyed or easily lost is not ideal. Consider a safe deposit box, a bank vault, or durable options like metal engravings or seed phrase plates.
Hot Wallets vs. Cold Wallets
Wallets fall into two categories: hot wallets and cold wallets. The difference lies in the security they provide. Both encompass a range of solutions. Refer to Cryptocurrency Wallet Types Explained for more use cases. Let’s explore the distinctions.
Hot Wallets
Hot wallets are cryptocurrency wallets connected to the internet, such as those on smartphones or desktops. They generally offer the smoothest user experience, making it easy to send, receive, or trade cryptocurrencies and tokens. However, this convenience often comes with security trade-offs.
Because hot wallets are online, they are vulnerable to attacks. Even if your private key is secure, the connected device could be hacked or controlled remotely.
This doesn’t mean hot wallets are entirely unsafe, but they are less secure than cold wallets. They are user-friendly and often the preferred choice for users with smaller balances.
Cold Wallets
To eliminate online vulnerabilities, many users keep their keys offline using cold wallets. Unlike hot wallets, cold wallets are not connected to the internet. In the past, some holders used paper wallets—a sheet of paper printed with the wallet’s private key, usually as a QR code. However, this method is now considered outdated and risky. The best cold storage option today is a hardware wallet.
Hardware Wallets
Hardware wallets (e.g., Trezor One or Ledger Nano S) aim to provide a better user experience while keeping private keys offline. These devices are more portable and affordable than computers and are specifically designed for storing cryptocurrency.
The physical device securely stores your private keys and never needs to connect to the internet. A quality hardware wallet ensures that private keys never leave the device, often stored in a dedicated, non-removable area. For more details, read What Is a Hardware Wallet (and Why Should You Use One)?
The hardware wallet industry has grown rapidly, offering dozens of products. You can find reviews of various devices on Binance Academy.
Custodial vs. Non-Custodial Wallets
Your wallet can be custodial or non-custodial, meaning you either have access and control over your private keys or you don’t. If you use an online service like a cryptocurrency exchange, you don’t truly own your tokens at the protocol level. Instead, the exchange holds your funds and keys on your behalf (hence, custodial wallet). Most exchanges use a combination of hot and cold wallets to safeguard your tokens.
For instance, if you trade BTC for BNB (Binance Coin), the exchange adjusts your BNB and BTC balances in its database without an on-chain transaction. When you withdraw BTC, you request the exchange to sign the transaction on your behalf. It broadcasts the transaction and sends the tokens to your provided Bitcoin address.
Cryptocurrency exchanges offer a convenient experience for users who are comfortable with third-party custody. The risk of being your own bank is that if something goes wrong, no one can help you recover your funds.
If you lose your private keys, you cannot recover your assets. On the other hand, if you lose your account password, you can reset it. Your private keys could still be stolen, so it’s essential to take the proper precautions outlined above to protect your account.
What Is the Safest Storage Method?
Unfortunately, there is no one-size-fits-all answer; otherwise, this article wouldn’t be necessary. The best choice largely depends on your risk profile and how you use cryptocurrency.
For example, active traders and long-term holders have different needs. If you run an institution handling significant funds, you might want to set up multi-signature functionality, requiring multiple approvals for transactions.
For the average user, it’s best to keep unused funds in cold storage. A hardware wallet is the most straightforward option, but test it with a small amount before committing significant assets. Backup your private keys separately, as described earlier, in case the device is lost or malfunctions.
Web wallets are suitable for holding small amounts for everyday purchases and services. If cold storage is like a savings account, your mobile wallet is like the physical wallet you carry. Ideally, losing these funds shouldn’t cause significant financial hardship.
Custodial wallets are excellent for lending, staking, and trading. However, before investing, have a plan for allocating your funds (e.g., using a position sizing strategy). Remember, digital currencies are highly volatile, so never invest more than you can afford to lose.
Using DeFi and DApps Safely
If you want to stake your tokens, use them in blockchain games, or participate in decentralized finance (DeFi), you’ll need to interact with DApps and smart contracts. Users must authorize DApps to use the funds in their wallets. Consider SushiSwap as an example.
For instance, authorizing PancakeSwap allows it to perform automated actions, such as adding multiple tokens to a liquidity pool. DApps can execute multiple steps in one go, saving you time. While useful, this convenience carries risks.
Unless you’ve researched the smart contract and understand exactly what it does, there’s always a chance of a backdoor exploit. Generally, projects undergo audits to ensure their smart contracts’ security. CertiK is a well-known audit service provider, but audits don’t guarantee absolute safety.
A compromised project might request authorization to move an unlimited or large number of tokens. Inexperienced users are more likely to approve these and fall victim to fraud. Even after withdrawing funds from a DeFi platform, the project might retain some control and could steal funds. Hackers might also manipulate and abuse smart contracts. If you’ve granted permissions to a project, you could be at risk again.
Revoking Wallet Permissions
You should periodically review the permissions you’ve granted in your wallet. If you use Binance Smart Chain (BSC), BscScan’s Token Approval Checker tool lets you inspect and revoke any permissions.
First, copy and paste your public BSC BEP-20 address. Then, click the search icon on the right.
You’ll see a list of smart contracts with permissions for your account and the approved amounts. To revoke a permission, click the button indicated in the red circle.
Using Audited Projects for Enhanced Security
As mentioned, audited projects are safer for investing in tokens and cryptocurrencies. If you’re interacting with smart contracts, staking in pools, or providing liquidity, always look for audited projects.
An audit involves analyzing a DApp’s smart contract code. Auditors look for backdoors, exploitable scripts, and security issues, reporting them to the project founders for fixes. Any changes are documented in a final report, which is shared transparently with users.
While audits don’t guarantee security, they significantly improve the chances that your funds will be safe. It’s wise to invest in projects with audits. Some smart contracts handle vast sums, making them attractive targets for hackers. If auditors haven’t reviewed the code, these contracts are more vulnerable.
CertiK regularly updates its list of audited projects, along with their safety scores and other vital information.
Avoiding Scams
Unfortunately, cryptocurrency attracts many scammers. Individuals attempt to steal crypto from other users, and once funds are taken, they’re usually irrecoverable. The anonymity of crypto and the fact that users directly control substantial sums create opportunities for fraud.
Always remain vigilant. Never send money to unfamiliar individuals, and double-check the identity of anyone you transact with. Here are some common scams to watch out for:
- Phishing - You might receive emails from what appears to be your exchange or another service, asking you to log in or provide personal information. This could be a scammer attempting to steal your data.
- Fake exchanges - These are often mobile apps or websites disguised as legitimate exchanges. Once you enter your details, scammers use them to access your real account.
- Ransomware - Scammers might infect your device with malware that holds your files hostage. You may be asked to send Bitcoin or other currencies to regain access, but there’s no guarantee you’ll get your files back.
- Pyramid and Ponzi schemes - You might be invited to join a new project, buy its tokens, or pay crypto for a special opportunity. If it sounds too good to be true, it probably is. Always research before investing.
- Impersonation - Scammers may pose as government officials, trusted figures, or even friends. They then request cryptocurrency or information you wouldn’t normally provide. Verify the person’s identity carefully in such cases.
For more on these scams and how to avoid them, read the guide on 8 Common Bitcoin Scams and How to Avoid Them.
Frequently Asked Questions
What is the most secure type of cryptocurrency wallet?
Hardware wallets, also known as cold wallets, are generally considered the most secure option for storing cryptocurrency. They keep your private keys completely offline, immune to online hacking attempts. For optimal security, combine a hardware wallet with a securely stored, offline backup of your seed phrase.
How can I tell if a decentralized application (DApp) is safe to use?
Always check if the DApp has been audited by a reputable security firm like CertiK or ConsenSys Diligence. Look for official links on the project's verified social media channels (Twitter, Discord, etc.). Avoid clicking on ads for DApps; instead, bookmark the official URL after verifying it. Be wary of sites offering unrealistically high returns, as these are often scams.
What should I do if I suspect my exchange account has been compromised?
Immediately enable two-factor authentication (2FA) if you haven't already. Change your password and contact the exchange's support team directly through their official website. Review your account activity for any unauthorized transactions and revoke any suspicious API keys or connected applications. For a comprehensive security setup, explore more strategies on securing your digital assets.
Are centralized exchanges safe for storing large amounts of cryptocurrency?
While reputable centralized exchanges employ strong security measures like cold storage for user funds, they are still third-party custodians. The adage "not your keys, not your coins" applies. For large, long-term holdings, transferring funds to a self-custodied hardware wallet is highly recommended. Use exchanges primarily for trading and keep only necessary funds on them.
How often should I review the permissions I've granted to DApps?
It's good practice to review your wallet's granted permissions at least once a month. Use blockchain explorers like Etherscan for Ethereum or BscScan for BSC to check and revoke any allowances you no longer need. This minimizes the risk of funds being drained from a smart contract vulnerability or a malicious actor gaining access.
What are the best practices for creating and storing a seed phrase?
Never digitize your seed phrase. Avoid storing it on cloud services, notes apps, or taking photos of it. Write it down on a durable material like metal (e.g., a seed storage plate) to protect against fire and water damage. Store it in a secure, private location like a safe or safety deposit box. Memorizing it is an additional layer of security, but ensure you have a physical backup.
Conclusion
The blockchain industry today offers numerous security measures for safeguarding your cryptocurrency. From trading to storing and using your digital assets, simple methods can effectively protect your funds. Each storage alternative has its own trade-offs between convenience and security. As always, conduct thorough research on any investment vehicle before committing your funds or cryptocurrency.