Seed phrase security — protecting your crypto

The seed phrase is the single most important element of crypto wallet security. Get it right and your funds are safe regardless of what happens to your device. Get it wrong and there is no recovery. Here is a practical guide to handling it correctly.

What a seed phrase is

When you set up a new non-custodial wallet, it generates a 12 or 24-word seed phrase from a standardized word list. This phrase is a human-readable encoding of your wallet's master private key. Anyone with this phrase can regenerate your wallet and access all funds associated with it, on any compatible wallet software, without needing your device or your password.

How not to store it

Do not store it digitally — not in a note app, not in a text file, not in a photo, not in a password manager, not in email. Digital storage creates exposure to device compromise, cloud sync vulnerabilities, and the fact that digital files can be copied without your knowledge.

Do not store it in your primary email or cloud account. If those accounts are compromised, your seed phrase is compromised. Keeping seed phrase and account credentials in the same compromised account eliminates all security.

The correct approach

Write it on paper. Store the paper in a physically secure location — a safe, a lockbox, or somewhere in your home that would not be accessible in a casual break-in. If you want extra durability, stamp or engrave it onto metal card stock, which survives fire and water that paper does not.

Consider making one copy stored in a second location — a trusted family member's safe, a bank deposit box — in case your primary storage location is destroyed. Two physically separate backups eliminate single-point-of-failure risk from fire, flood, or theft at one location.

Never photograph the written seed phrase. The photo file becomes the digital storage you were trying to avoid.