シードフレーズ
シードフレーズ（リカバリーフレーズとも呼ばれます）は、暗号通貨ウォレットを復元するために使用できる12〜24個の単語のリストです。
A seed phrase, also commonly referred to as a recovery phrase or mnemonic phrase, is a sequence of words generated by a cryptocurrency wallet that serves as a human-readable backup for the wallet's private keys. Typically comprising 12, 18, or 24 words chosen from a standardized list (like the BIP-39 list), this phrase represents the master secret from which all the wallet's private keys and corresponding public addresses can be deterministically recreated. When setting up a new wallet, users are prompted to record their seed phrase. If a user loses access to their wallet device (e.g., due to hardware failure, loss, or theft), they can restore their entire wallet, including all its transaction history and balances, on a new device or different wallet software simply by entering the correct seed phrase. This makes the seed phrase the most critical piece of information for wallet recovery, but also the most significant security risk if compromised, as it grants complete control over the associated cryptocurrency assets.
graph LR
Center["シードフレーズ"]:::main
Rel_private_key["private-key"]:::related -.-> Center
click Rel_private_key "/terms/private-key"
Rel_seed_phrase_security["seed-phrase-security"]:::related -.-> Center
click Rel_seed_phrase_security "/terms/seed-phrase-security"
Rel_hashing["hashing"]:::related -.-> Center
click Rel_hashing "/terms/hashing"
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🧠 理解度チェック
🧒 5歳でもわかるように説明
It's like a secret code made of words that unlocks your digital piggy bank. If you lose your piggy bank, you can use the secret code to get a new one with all your money inside.
🤓 Expert Deep Dive
Seed phrases are generated based on standards like BIP-39, which defines a list of 2048 words and a process for converting entropy (randomness) into a sequence of words. This phrase is then used to generate a binary seed via a PBKDF2 function, which subsequently seeds a Hierarchical Deterministic (HD) wallet structure as defined by BIP-32. This deterministic nature ensures that the same seed phrase will always generate the same sequence of private keys, enabling reliable recovery. The security of the entire system hinges on the entropy used to generate the initial seed and the secure handling of the phrase itself. Vulnerabilities can arise from insufficient entropy during generation or insecure storage and transmission of the phrase.