LiveSecret

LiveSecret allows two people to securely exchange shared secrets using end-to-end encryption.

1. Enter secret data into the box above.
2. Press Encrypt. The data is encrypted locally before being sent to the server. The passphrase stays with you.
3. You send the provided instructions to the recipient out-of-band.
4. Unlock the intended recipient when you see they have arrived on the page.

More details at the LiveSecret GitHub project.