BitDefender Chat Encryption is a free program that keeps your instant messages safe from hijacking through a simple and automatic encryption process. It protects your confidential documents and your instant messaging conversations through Yahoo! Messenger (8.1 or newer) and Windows Live (MSN) Messenger (v8.5 or newer).
To use BitDefender Chat Encryption, you just have to make sure the persons you are talking to install on their computer the same encryption tool or a BitDefender product, version 2009 or higher.
Main features of BitDefender Chat Encryption are: The tool does not require any password or other special settings. When a conversation is initiated, the encryption procedure begins automatically. Its top level encryption guarantees that only you and your contact have access to your IM conversations.
Requirements: Windows XP SP2 (32 bit), Windows Vista (32 bit), Yahoo! Messenger v8 or higher, Windows Live Messenger v8.5 or higher