I may have something useful to add - If you are chatting on gmail chat, it logs your chat conversations. If you install a chat client like Pidgin and install the OTR plugin ("off the record") on both sides (so you and the person you're chatting with), the chats are logged as unreadable text. Adium (for mac) also has the possibility for OTR.
About the gmail chat
If you are chatting on gmail chat, it logs your chat conversations. If you install a chat client like Pidgin and install the OTR plugin ("off the record") on both sides (so you and the person you're chatting with), the chats are logged as unreadable text. Adium (for mac) also has the possibility for OTR.