Guides
Explore how to create a message, open it and understand its encryption.
Guides / 01
How to hide a private message inside ordinary text
Write the visible sentence and your private words. Coo encrypts the private words.
GuidesCoo
How to send and open private words with Coo
Connect once, write two meanings, and keep using the messenger you already have. The other person copies the ordinary-looking message into Coo to open what’s hidden.
How it worksCoo
Security architecture
Private text is never stored on Coo servers.
How it works