Abstract
RFID System of Ubiquitous which is one of problem that may occur in a process of replacing bar code in 21st century. Ubiquitous computer environment should be considered to be most important task to protect information. For introduction, this presentation going to discuss the background information, the purpose of Ubiquitous and potential problems in individual privacy in computer environment. In main part, the content will handle the practices and weakness in security of computer environment in Ubiquitous. Last part of presentation going to examine, futuristic views in solving existing problems with alternative solutions to prohibit invasion in privacy.