i'd like to open this topic for IM security. till now, i experienced some combo of IM security and would like to talk them here. try to find a stupid, simple, effective one. from old days, some one told me that msn employed simple encode with message and i moved to msn+simplite for msn for security. but, simplite hooks all socks and it's hard for newbie to config it. even it has good RSA+AES protection level. then i move to skype, you guys know, it has good built-in heavy encryption. but from wiki, some investigator said the company could decode it. and skype is not good at text chatting, it's for voice. these days, i found aim can encrypt the msg by a simple cert. pgp desktop also provides pulgin for aim. but i never move to it since all my friends are on msn/skype. btw. forget about qq, the company keeps 2~3yr of data in case the cop needs to check them. what are you guys using for im security? feel free to drop your idea here.