Write a letter today; until the day you choose, no one — not even us — can open it. Your letter lives on paper only.
Write your letter and, if you like, attach photos and files — no sign-up.
Encrypted on your phone; the key is locked to the date using the world's shared clock (drand).
An origami envelope PDF is produced; attachments travel encrypted in the digital capsule file — paper carries the text.
Give the envelope today. Distribution is yours; we never send anything.
The lock falls on its own; the letter is decrypted on the recipient's phone.
Enter the transaction from the CHAIN PROOF link inside the envelope and the letter's seal (hash) — verify from the chain, without asking us, that the letter was sealed that day and not a character has changed.