Every major cryptocurrency exchange requires Know Your Customer (KYC) verification: government ID, selfie, proof of address, and sometimes even bank statements. This data becomes a high-value target for hackers. Exchange breaches have exposed millions of users' personal information.
The KYC Data Problem
When you complete KYC on a crypto exchange, you hand over some of your most sensitive personal data. If that exchange is breached (and many have been), attackers get your full legal name, home address, government ID number, and photos of your face, all linked to your cryptocurrency holdings.
Minimizing Your Exposure
While you cannot avoid KYC entirely on regulated exchanges, you can minimize the damage from potential breaches:
- Use a unique email for each exchange. A disposable email for initial research, then a dedicated email for the account you actually use.
- Enable hardware 2FA (YubiKey), not SMS-based authentication which is vulnerable to SIM swapping.
- Withdraw to self-custody after purchasing. Do not leave funds on exchanges longer than necessary.
- Use a PO Box for address verification if your jurisdiction allows it.
- Limit exchanges to one or two reputable platforms rather than spreading your KYC data across many.
After a Breach: What to Do
If an exchange you use is breached, assume the worst. Change passwords immediately, monitor for identity theft, consider freezing your credit, and be alert for targeted phishing using your leaked information.
Decentralized Alternatives
Decentralized exchanges (DEXs) like Uniswap or dYdX operate without KYC for most transactions. Peer-to-peer platforms can also reduce the amount of personal data you need to share. However, these come with their own risks including smart contract vulnerabilities and lack of customer support.