I added HPKE algorithm parameters to the FEP:
https://codeberg.org/silverpill/feps/src/branch/main/0806/fep-0806.md#algorithms
> KEM: DHKEM(X25519, HKDF-SHA256)
> AEAD: ChaCha20Poly1305
> KDF: HKDF-SHA256
> "info" string: fep-0806-info
> "aad" string: fep-0806-aad
Does it look right?
KEM/AEAD/KDF choices are not my preferences, I just copied them from another HPKE+ed25519 implementation.
silverpill
npub19y…5wysk
2026-07-21 10:18:29 UTC
in reply to nevent1q…myw6
Author Public Key
npub19yg7mshq9vdtvvcm48svw03cmzewue4jug62cltnleh3y78khz5sm5wyskSeen on
wss://relay.momostr.pinkPublished at
2026-07-21 10:18:29 UTCEvent JSON
{
"id": "71f477a28e9df17baafc5d0023d5d10e4f60d95a4917fa933c3fa9b8d67eb0c5",
"pubkey": "2911edc2e02b1ab6331ba9e0c73e38d8b2ee66b2e234ac7d73fe6f1278f6b8a9",
"created_at": 1784629109,
"kind": 1,
"tags": [
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"content": "I added HPKE algorithm parameters to the FEP:\n\nhttps://codeberg.org/silverpill/feps/src/branch/main/0806/fep-0806.md#algorithms\n\n\u003e KEM: DHKEM(X25519, HKDF-SHA256)\n\u003e AEAD: ChaCha20Poly1305\n\u003e KDF: HKDF-SHA256\n\u003e \"info\" string: fep-0806-info\n\u003e \"aad\" string: fep-0806-aad\n\nDoes it look right?\n\nKEM/AEAD/KDF choices are not my preferences, I just copied them from another HPKE+ed25519 implementation.",
"sig": "538eb67ae5818ea6141bb1228923a6c681821cdcb438a5b6ad3a627bec7ef82921a60667e87306b7a0b94875e1b9ff82c56e107616ff495566420d8281e66ae4"
}