Note: I&#x27;m the author of a similar tool.<p>About 2 years ago I wrote Taniger which is a tool that does the same thing but without having to set a preset password for all chats (each message has its own encryption key).<p>What I found out during these 2 years is that facebook changes it&#x27;s chat HTML from time to time making the encryption &quot;not work&quot; as it cannot detect the encrypted text. I believe this is what happened with crypter - but I can&#x27;t be 100% sure as I don&#x27;t have time today to check if that&#x27;s the case (I tried installing it but I got an error message when I tried to set its password).<p>P.S.
The Taniger site is currently offline as I&#x27;m re-writing it to support PGP encryption, but you can see a demo at <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=cU57xQcAcd0" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=cU57xQcAcd0</a> and get the code at <a href="https:&#x2F;&#x2F;github.com&#x2F;sadreck&#x2F;taniger" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;sadreck&#x2F;taniger</a>