04 / Write
A letter
only they can open.
The text is encrypted in this tab with the recipient's ML-KEM-768 passport key and the envelope is signed by your wallet. The registry stores the sealed envelope: it can see who wrote to whom, not what.
Note: your wallet address is visible to the server and to the recipient; the text is not. An attached USDC payment is a public transfer: the amount and both wallets are on chain, only the note is private. Letters are one-way for now. A reply needs a passport of your own.