UCard中动态地址总线的安全稳定性

Analysis of security and stability of dynamic address bus in UCard

对UCard动态地址总线的安全性、稳定性进行了分析,给出了动态地址总线的安全稳定性的数学模型,讨论了实现动态地址总线安全稳定性的设计方法,包括定时查询、自锁电路以及地址总线信号观测等方法,重点讨论了实现稳定性的方法———自锁电路和地址总线信号观测方法.自锁电路的方法实现简单且有效,地址总线信号观测方法实现复杂但可靠性高,较好地解决了UCard动态地址总线的安全稳定性问题.

The security and stability of dynamic address bus in （Universal smart card） UCard was analyzed. A mathematic model of the security and stability is proposed. Then several approaches to achieve the security and stability, including time inquiring, self lock circuit and dynamic address bus observer are analyzed. The approach of self-locking is simple to implement and effective, while the approach of dynamic address bus observer is difficult but has high reliability. In general, these approaches gratly improve the security and stability of dynamic address bus in UCard.