n_signer CYD Web Serial Demo

Connect to the CYD (CH340 serial) via Web Serial, then exercise every algorithm and verb in the n_signer API. Chrome/Edge/Brave/Opera only.

Disconnected

Get Public Key (algorithm)

Algorithm Index

nostr_index format

Algorithm Index scheme (secp256k1 only) message (hex)

peer pubkey hex (1184 bytes / 2368 hex) — leave empty to use self pubkey index (for decapsulate) ciphertext hex (for decapsulate)

peer pubkey hex (32 bytes / 64 hex) index

data (UTF-8 string) index (required)

content nostr_index

Slow on ESP32 — uses single-threaded PoW. Keep difficulty low.

content nostr_index difficulty (leading zero bits) timeout (sec)

peer pubkey hex (32-byte x-only) plaintext ciphertext (for decrypt) nostr_index

peer pubkey hex (32-byte x-only) plaintext ciphertext (for decrypt) nostr_index

OTP pad is derived from the mnemonic on the CYD. Offset advances monotonically.

plaintext (base64) ciphertext (for decrypt, base64) encoding