Seed Phrase (Recovery Phrase)

Definition

A seed phrase is a human-readable backup of your wallet's master secret, typically 12-24 words from a standardized list (BIP-39). The seed phrase can regenerate all private keys and addresses, enabling wallet recovery. Post-quantum wallets use seed phrases to back up quantum-resistant keys.

Technical Explanation

Seed phrases encode 128-256 bits of entropy as words from a 2048-word list. Cryptographic derivation functions (PBKDF2, then HD key derivation) produce master keys from the seed. All wallet addresses and private keys derive deterministically from this master.

For post-quantum wallets, seed phrase entropy initializes Kyber and SPHINCS+ key generation. The derivation path may differ from classical BIP-32/44, but the principle remains: one seed phrase recovers all keys. Larger key sizes don't require longer phrases.

SynX Relevance

SynX wallets generate standard seed phrases compatible with secure backup practices. Your 24-word phrase recovers both Kyber-768 key pairs and SPHINCS+ signing keys. Write down your seed phrase, store it securely offline, and you can always recover your quantum-resistant wallet.

Frequently Asked Questions

Are quantum seed phrases longer?: No—24 words (256 bits) provides sufficient entropy for quantum-resistant key derivation.
Can someone guess my seed phrase?: Not feasibly—24 words from 2048 options creates 2²⁵⁶ possibilities, impossible to guess even with quantum computers.
Should I store seed phrases digitally?: Prefer offline storage (paper, metal). Digital copies risk theft if your device is compromised.

Secure backup for quantum-resistant keys. Back up your SynX wallet today