Use plic to send a one-time secret message.

How it works
  1. A secure, secret key is generated in the browser.
  2. The key is used to encrypt the message.
  3. The encrypted message is then sent to the server.
  4. A link is generated by combining the tag obtained from the encryption process and the secret key.
  5. The secret key is attached to the hash portion of the URL which is never sent to the server.
  6. When a link is opened, the encrypted message is simultaneously retrieved and deleted from the server.
  7. The secret key stored in the URL is used to decrypt the encrypted data and the message is displayed.
Technical details along with source code are available at