BIP85: add Nostr application

.typos.toml

@@ -17,6 +17,7 @@ extend-ignore-re = [
     "value: .*",
     "pqNTRUsign",
     "Strnad",
+    "nsec1.*",
 ]
 
 [default.extend-words]

bip-0085.mediawiki

@@ -423,6 +423,52 @@ OUTPUT
 * DERIVED ENTROPY=5e41f8f5d5d9ac09a20b8a5797a3172b28c806aead00d27e36609e2dd116a59176a738804236586f668da8a51b90c708a4226d7f92259c69f64c51124b6f6cd2
 * DERIVED ROLLS=1,0,0,2,0,1,5,5,2,4
 
+===Nostr===
+
+Application number: 86'
+
+The application number is the sum of the alphabetical positions of the letters in Nostr (n=14 + o=15 + s=19 + t=20 + r=18) to avoid the confusion with NIP06.
+
+The derivation path format is: <code>m/83696968'/86'/{identity}'/{account}'</code>
+
+Uses the entropy as a Nostr private key.
+
+Identity index <code>0'</code> is reserved for future protocol use.
+Account index <code>0'</code> is reserved across all identities for key management operations.
+Usable keys start at <code>identity >= 1'</code> and <code>account >= 1'</code>.
+
+The resulting 32-byte private key is Bech32 encoded as an <code>nsec</code> per NIP19.
+
+====identity=1, account=1====
+
+INPUT:
+* MASTER BIP32 ROOT KEY: xprv9s21ZrQH143K2LBWUUQRFXhucrQqBpKdRRxNVq2zBqsx8HVqFk2uYo8kmbaLLHRdqtQpUm98uKfu3vca1LqdGhUtyoFnCNkfmXRyPXLjbKb
+* PATH: m/83696968'/86'/1'/1'
+
+OUTPUT
+* DERIVED ENTROPY=7f3313b1bdeacc4f395c666b473982550cdc66c225fd7e7b0f5d11d33cddde31
+* DERIVED NSEC=nsec10ue38vdaatxy7w2uve45wwvz25xdcekzyh7hu7c0t5gax0xamccsyuyesn
+
+====identity=1, account=2====
+
+INPUT:
+* MASTER BIP32 ROOT KEY: xprv9s21ZrQH143K2LBWUUQRFXhucrQqBpKdRRxNVq2zBqsx8HVqFk2uYo8kmbaLLHRdqtQpUm98uKfu3vca1LqdGhUtyoFnCNkfmXRyPXLjbKb
+* PATH: m/83696968'/86'/1'/2'
+
+OUTPUT
+* DERIVED ENTROPY=41fbfba9227f7d261ccb90f61264fd0b38e1f762108c31135f8fc138329594ff
+* DERIVED NSEC=nsec1g8alh2fz0a7jv8xtjrmpye8apvuwramzzzxrzy6l3lqnsv54jnlsuxjsql
+
+====identity=2, account=1====
+
+INPUT:
+* MASTER BIP32 ROOT KEY: xprv9s21ZrQH143K2LBWUUQRFXhucrQqBpKdRRxNVq2zBqsx8HVqFk2uYo8kmbaLLHRdqtQpUm98uKfu3vca1LqdGhUtyoFnCNkfmXRyPXLjbKb
+* PATH: m/83696968'/86'/2'/1'
+
+OUTPUT
+* DERIVED ENTROPY=a159a41860a18457855511334a3c813430468ec3c1ef17700d4917d0e881a45a
+* DERIVED NSEC=nsec159v6gxrq5xz90p24zye550ypxscydrkrc8h3wuqdfytap6yp53dq5gdpd6
+
 ==Backwards Compatibility==
 
 This specification is not backwards compatible with any other existing specification.
@@ -431,7 +477,7 @@ This specification relies on BIP32 but is agnostic to how the BIP32 root key is
 
 ==References==
 
-BIP32, BIP39
+BIP32, BIP39, [https://github.com/nostr-protocol/nips/blob/master/01.md NIP01], [https://github.com/nostr-protocol/nips/blob/master/06.md NIP06], [https://github.com/nostr-protocol/nips/blob/master/19.md NIP19]
 
 ==Reference Implementations==
 
@@ -441,6 +487,12 @@ BIP32, BIP39
 
 ==Changelog==
 
+===2.1.0===
+
+====Added====
+
+* Nostr application 86'
+
 ===2.0.0 (2025-09-19)===
 
 ====Fixed====