Context access control problem remains a major challenge in the security researches of pervasive computing. 上下文訪問控制是普適計算安全中極具挑戰性的重要問題。
Pervasive computing aims to enable people to accomplish an increasing number of personal and professional transactions using a new class of intelligent and portable devices. 普適計算通過使用一類新的智能與便攜式設備使人們能完成日益增長的許多個人和專業的事務。