Keine Ahnung ob das was taugt, klingt aber ganz hilfreich wenn man es eilig hat, oder nicht viel technisches Know-How mitbringt.

cryptocat lets you set up encrypted, private chats for impromptu secure conversations. check out this video for tips on how to get started!
your messages are encrypted before leaving your computer using AES-256 and are verified for integrity. all conversations are securely wiped after 30 minutes of inactivity.
cryptocat is fully compatible with Tor for anonymous chatting. couple cryptocat with Tor anonymization for maximum confidentiality.