TEACH ME BITCOIN, SON. on Nostr: Dad: Son, what is a passphrase? Son: Hi Dad, The BIP39 standard supports an optional ...
Dad: Son, what is a passphrase?
Son: Hi Dad,
The BIP39 standard supports an optional 25th word, a so-called passphrase. The passphrase encrypts the seed and creates a new wallet.
Dad: Son, do I have limitations? Size, or something?
Son: On the Coldcard hardware wallet for example, passphrases are limited to 100 characters in length. The on-screen interface supports ASCII characters only.
Dad: Okay, that is a powerful feature!
Son: So little effort and so much more security.
#Bitcoin
Published at
2026-07-14 09:38:00 UTCEvent JSON
{
"id": "afd59cf1a7658958f52fb5a1472d458f6b2cc6948f5a41f82172207d70688ae1",
"pubkey": "e0893162d4045dd1113c6e1c29f70c47bb7461abed042b6c33308fe7d96d2502",
"created_at": 1784021880,
"kind": 1,
"tags": [],
"content": "https://www.teach-me-bitcoin-son.com/media//generated/what-is-a-bip039-passphrase.png\n\nDad: Son, what is a passphrase?\nSon: Hi Dad,\nThe BIP39 standard supports an optional 25th word, a so-called passphrase. The passphrase encrypts the seed and creates a new wallet.\nDad: Son, do I have limitations? Size, or something?\nSon: On the Coldcard hardware wallet for example, passphrases are limited to 100 characters in length. The on-screen interface supports ASCII characters only.\nDad: Okay, that is a powerful feature!\nSon: So little effort and so much more security.\n\n\n#Bitcoin",
"sig": "a9daa1f5f694ace289671f2b83785da8275e3194fb0becb57130a16159b6a240e8401ab3fed460617df41d3bd9dbb3c6e3ce863a5dae4e7c0a31b697b2f48a35"
}
