--- title: "Seed Phrases: Creating, Storing and Protecting Them" url: "https://bip39-phrase.com/topics/seed-phrases/" language: "en" --- # Seed Phrases: Creating, Storing and Protecting Them A seed phrase is the master backup of a wallet: 12 to 24 words from the BIP39 list that encode the randomness every key is derived from. These guides cover how a phrase is generated and checked, why a self-made phrase is unsafe, and how to store, memorize or encrypt one without creating a new weak point. ## Start here ![How to Create a Seed Phrase: Step-by-Step Guide and Examples](/wp-content/uploads/2024/10/create-a-seed-phrase-card.webp) Seed Phrases Oct 21, 2024 ## [How to Create a Seed Phrase: Step-by-Step Guide and Examples](/create-a-seed-phrase/) ![How to Store a Seed Phrase: Paper, Steel and Safe Locations](/wp-content/uploads/2025/10/How-to-Store-a-Seed-Phrase-card.webp) Seed Phrases Oct 28, 2025 ## [How to Store a Seed Phrase: Paper, Steel and Safe Locations](/store-a-seed-phrase/) ## More in Seed Phrases - [How to Generate a BIP39 Seed Phrase with Dice, Step by Step](/seed-phrase-with-dice/) Each roll of a fair die adds 2.585 bits: 50 rolls make a 12-word BIP39 seed phrase, 99 a 24-word one. Two methods, a worked example and the last word. - [Seed Phrase Formats by Network: BIP39 and the Exceptions](/seed-phrase-formats-by-network/) Bitcoin, Ethereum, Solana and Cosmos use BIP39 seeds, Cardano and Polkadot derive their own keys from BIP39 words, and Monero, TON and XRP use other formats. - [12 vs 24 Word Seed Phrase: Which Is More Secure?](/12-vs-24-word-seed-phrase/) A 24-word seed phrase has 256 bits of entropy and a 12-word one 128, but both are beyond brute force; 24 words help mainly when part of a backup is exposed. - [BIP39 Passphrase: How the 25th Word Creates a Hidden Wallet](/bip39-passphrase/) A BIP39 passphrase, the 25th word, is mixed into the seed, so the same words open a separate hidden wallet; a typo opens an empty one, so back it up exactly. - [Electrum Seed vs BIP39: Why Other Wallets Reject It](/electrum-seed-vs-bip39/) An Electrum seed is not BIP39: it uses a version prefix instead of the BIP39 checksum and its own salt, so BIP39 wallets reject it or open an empty wallet. - [Metal Seed Phrase Backup: Steel Plates, Tiles and Tests](/metal-seed-phrase-backup/) A metal seed phrase backup stamps or engraves your words into steel or titanium to survive fire and flood; stress tests show design matters as much as metal. - [How to Memorize a Seed Phrase: Color, Story and Palace Methods](/seed-phrase-memory/) To memorize a seed phrase, turn each word into an image, link the images in a story or memory palace, add color cues and recall them on a spaced schedule. - [Can You Guess a Seed Phrase? Probability and Real Risks](/can-you-guess-a-seed-phrase-probability-and-real-risks/) No: a random 12-word BIP39 phrase is one of 2¹²⁸ possibilities and a 24-word one of 2²⁵⁶; real losses come from weak generators, self-chosen words and scams. - [How to Encrypt a Seed Phrase: AES, XOR and Steganography](/seed-phrase-encrypting-with-aes-xor-and-steganography/) You can encrypt a seed phrase with AES, split it with Seed XOR or hide it with steganography, but each method adds a key or password you must back up too. - [Why You Should Never Create Your Own Seed Phrase](/why-you-should-never-create-your-own-seed-phrase/) Words you pick are far easier to guess than random ones; brain wallets made from invented phrases were usually drained within a day. Use a generator or dice. - [Seed Phrase Examples: 12, 18 and 24 BIP39 Mnemonic Phrases](/mnemonic-words-examples-for-crypto-security-bip39/) Real BIP39 seed phrase examples for 12, 18 and 24 words from the official test vectors, with their entropy, checksum bits and why random words fail. - [Is a Seed Phrase Case Sensitive? BIP39 Words vs Passphrase](/is-seed-phrase-case-sensitivity-really-important/) No: BIP39 words are all lowercase and most wallets ignore capitals in them, but the passphrase is case-sensitive, so one wrong capital opens another wallet. - [Monero Seed Phrase: 25 Words, Polyseed and Private Keys](/seed-phrase-and-private-key-format-of-monero-guide/) A Monero seed phrase is 25 words from Monero's own list that encode the private spend key; newer wallets use 16-word Polyseed. Neither works in BIP39 wallets. - [TON Seed Phrase: 24-Word Format vs 12-Word BIP39 Phrases](/seed-phrase-format-for-ton-wallets/) A classic TON seed phrase is 24 BIP39 words with TON's own validity check and key derivation, so BIP39 wallets can't restore it; new wallets may use 12 words. ## Tools - [Seed phrase generator](/generator-seed-phrase/) - [BIP39 wordlist (2048 words)](/) ## PDF documents on this topic All 11 printable explainers on this topic, including the [PDF archive](/list-phrase/), newest first. - [Don't Keep the Backup in the Hardware Wallet Box](/list-phrase/dont-keep-the-backup-in-the-hardware-wallet-2026-10-17/) · October 17, 2026 Storing your recovery seed inside the original hardware wallet box creates a single point of failure that compromises theft and disaster resilience. - [Off-Site Seed Backup Options Beyond Your Home](/list-phrase/how-to-safely-store-your-seed-phrase-2026-06-15/) · June 15, 2026 Compare off-site backup locations, physical security risks, and split-custody schemes to protect BIP39 recovery seeds against residential disasters. - [What Is the Entropy in Crypto?](/list-phrase/entropy-in-crypto-bip39-phrase-2025-10-25/) · October 25, 2025 Your Secret recovery phrase (seed phrase) is a set of human-readable words that represent a large randomly generated number called the entropy. - [How 12 Random Words Became Your Bank Vault](/list-phrase/vault%5Frandom%5Fbip39-phrase%5F2025-10-18.pdf) · October 18, 2025 - [Twelve Words to Rule Your World: The Seed Phrase as Digital Sovereignty](/list-phrase/bip39-phrase-rule-world-in-2025-june-17/) · June 17, 2025 A philosophical and technical reflection on the BIP-39 seed phrase and its role in digital self-sovereignty. - [Understanding Seed Phrases](/list-phrase/seed-phrase-understanding-june-09-2025/) · June 9, 2025 A seed phrase is a series of words generated by your cryptocurrency wallet that gives you access to the crypto associated with it. - [Mnemonic Archive Eng 31 march 2025 basic](/list-phrase/mnemonic-archive-eng-31-march-2025-basic.pdf) · March 31, 2025 - [Seed Phrase List - 03.30.2025](/list-phrase/seed-phrase-list-03.30.2025.pdf) · March 30, 2025 - [Monero Seed Phrase List - 2025-03-19](/list-phrase/monero-seed-phrase-list-eng-19-march-2025.pdf) · March 19, 2025 - [Why the BIP39 Wordlist Has Exactly 2,048 Words](/list-phrase/seed-phrase-list-eng-19-february-2025/) · February 19, 2025 BIP39 uses a 2,048-word dictionary so each word encodes exactly 11 bits of entropy, balancing phrase length with human usability and error prevention. - [Leaving Off the Last BIP39 Word: A False Trick](/list-phrase/seed-phrases-2025-01-08/) · January 8, 2025 Omitting the final BIP39 word adds virtually no security against attackers due to checksum constraints, while risking permanent fund loss.