Dead Drop
Encrypt a secret with a password and share the link. Everything happens in your
browser — the encrypted text is packed into the link's #fragment,
which is never sent to any server.
Anyone with this link and the password can read the secret. Send the password through a different channel. There's no server, so the message can't be revoked or set to auto-expire once shared.
Someone left you a dead drop. Enter the password to read it.