To deal with security challenges in context-aware model, we propose a pervasive computing terminal equipment architecture in which trusted computing technology is introduced. First, we give out a context-aware processing model for pervasive computing. Second, security requirements and challenges on terminal contextual processing are analyzed. To solve these security challenges, we apply trusted measure, trusted I/O, trusted storage and trusted report to achieve authenticity, confidentiality, privacy and integrity. Compared with traditional methods, the terminal architecture embedded with trust provides a better solution in dynamic and open pervasive computing environment.