Security
Seed Phrase
A series of 12-24 words that can recover a cryptocurrency wallet and all its accounts. Also called recovery phrase, mnemonic phrase, or backup phrase. Never share with anyone.
Last updated: January 5, 2025
What is a Seed Phrase?
A seed phrase (also called recovery phrase or mnemonic) is a human-readable backup of your entire cryptocurrency wallet. It’s typically 12 or 24 words that can regenerate all private keys and accounts in your wallet.
Example Seed Phrase
apple banana cherry dog elephant fish grape honey igloo jacket king lemon
This is just an example - never use a seed phrase from the internet!
How Seed Phrases Work
Generation
- Wallet creates random entropy (128-256 bits)
- Converts to mnemonic words (BIP-39 standard)
- Words derive master private key
- Master key derives all wallet addresses
Recovery
- Enter 12/24 words in correct order
- Wallet recalculates master key
- All accounts automatically restored
- Works on any compatible wallet
Why Seed Phrases Matter
One Phrase, Many Keys
- Controls entire wallet
- All cryptocurrencies within
- All addresses (past and future)
Hardware Independent
- Phone breaks? Recover with phrase
- Computer crashes? Recover with phrase
- Ledger stolen? New device + phrase
Permanent Backup
- No expiration
- No server needed
- Works forever
Seed Phrase Security
NEVER Do This
- Store digitally (photos, notes apps, cloud)
- Share with anyone
- Enter on websites
- Send via email/message
- Store in plain sight
Best Practices
- Write on paper immediately
- Store in secure location (safe, safety deposit box)
- Multiple backups in different locations
- Consider metal backup (fire/water resistant)
- Memorize if possible (optional extra layer)
12 vs 24 Words
| Feature | 12 Words | 24 Words |
|---|---|---|
| Entropy | 128 bits | 256 bits |
| Security | Very high | Extremely high |
| Ease of backup | Easier | Harder |
| Common use | Mobile wallets | Hardware wallets |
Both are secure - 12 words is 2^128 possibilities.
What If Seed Phrase is Compromised?
Immediate Actions
- Transfer funds to new wallet immediately
- Generate new seed phrase
- Never use compromised phrase again
- Investigate how it was exposed
Prevention
- Never enter online
- Verify URLs carefully
- Beware of phishing
Seed Phrase Scams
Common Attacks
- Phishing sites asking for phrase
- Fake support requesting recovery phrase
- Malware capturing clipboard/keystrokes
- Physical theft of written phrase
Remember
- No legitimate service ever needs your seed phrase
- Support will never ask for it
- If someone asks, it’s a scam
Storage Solutions
Paper Backup
- Pro: Simple, offline
- Con: Can burn, get wet, fade
Metal Backup
- Pro: Fire/water resistant
- Con: More expensive, visible
Split Storage
- Pro: No single point of failure
- Con: Complex to recover
Memory
- Pro: Can’t be stolen
- Con: Can forget, can’t pass to heirs
Testing Your Backup
- Write down seed phrase
- Delete wallet from device
- Restore using seed phrase
- Verify all accounts recovered
- Done! Backup confirmed working
Ready to Start Trading?
Now that you understand seed phrase, explore the best exchanges to begin your crypto journey.