基于51单片机的液晶万年历 二十一世纪最具代表性的计时产品就是电子万年历。从原有传统指针计时的方式发展成为人们更为熟悉的数字显示方式，直观明了，并增加了全自动日期，星期，闹钟及附属的显示功能，它更符合消费者的生活需求。相信随着相关技术的发展和推进，一定会得到更大的应用。-Abstract　 This article presents　the AEGIS　secure processor　architecture, which enables　new　applications　by　ensuring　private　and　authentic　program　execution even in the face of physical attack. Our architecture uses two new primitives to achieve　physical　security.　First,　we　describe　Physical　Random　Functions　which reliably protect and share secrets in a manner that is cheaper and more secure than existing　solutions　based　on　non-volatile　memory.　Second,　off-chip　memory protection mechanisms ensure the integrity and the privacy of off-chip memory. Our processor, with its new protection mechanisms, has been implemented on an FPGA, and is fully functional. We briefly assess the cost of the security mechanisms in our processor and show that it is reasonable.

Introduction