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Seed phrases: storage that won't let you down
BIP-39, 12 words and 128 bits of entropy: how to write it down, where to keep it, why you must never photograph it, and what a passphrase (the 25th word) is.
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Published 2026-06-30. A practical deep-dive with real numbers, checks you can repeat and mistakes to avoid. Open the page in a JavaScript-enabled browser for the full text.
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