A good implementation and documentation for passphrases is Coldcard.
https://coldcard.com/docs/passphrase/
Using passphrases makes it possible to generate approximately 5.9 × 10197 different wallets based on your original seed words.
Passphrases must be:
- No longer than 100 characters.
- ASCII characters only (no accented letters)
- Upper case letters
- Lower case letters
- Numbers
- Symbols
relativelyirrelevant / Relatively Irrelevant
npub1a4…fpm2d
2025-08-14 11:54:29 UTC
in reply to nevent1q…aqz4
Author Public Key
npub1a4zcswp3jqcuzu2fgny3hsl4n3td5rnhj2tmyf2pepn7vvh5lnsscfpm2dPublished at
2025-08-14 11:54:29 UTCEvent JSON
{
"id": "f162c103bcdcb31cd3611d06ffd134dfd78fc2863445d4522802f7f96b4ed103",
"pubkey": "ed458838319031c1714944c91bc3f59c56da0e779297b22541c867e632f4fce1",
"created_at": 1755172469,
"kind": 1,
"tags": [
[
"e",
"39bf6938e2e091d74368390397576bd6c83f771c68f3358d18d1e11bb48a787a",
"wss://nostr.einundzwanzig.space",
"root",
"3731e169d0b3816f4a4a9ac84c66aa423d4f4ea0f78b56a1df90609b85be0885"
],
[
"e",
"4a151b147688feadcccda51716804e3bf1ecf3f2c0186282819fba4f90d76a9c",
"wss://relay.primal.net",
"reply"
],
[
"p",
"48747a0dd3a073821b9ecb5352a0a33ea2f5b775abe0393240a061b5dbe8a6bf",
"",
"mention"
],
[
"p",
"3731e169d0b3816f4a4a9ac84c66aa423d4f4ea0f78b56a1df90609b85be0885",
"",
"mention"
]
],
"content": "A good implementation and documentation for passphrases is Coldcard. \n\nhttps://coldcard.com/docs/passphrase/\n\nUsing passphrases makes it possible to generate approximately 5.9 × 10197 different wallets based on your original seed words.\n\nPassphrases must be: \n- No longer than 100 characters. \n- ASCII characters only (no accented letters)\n- Upper case letters \n- Lower case letters \n- Numbers \n- Symbols\n",
"sig": "99111a6c164e09e43297612fb8eb8a02b65428ba65cfb06832d138aa8d98595794ef094278fda515aa0e186cb9a511baa247498fa0a7a51dac80dc367bff8314"
}