gaoxiang的专栏

对称加密算法是应用较早的加密算法，技术成熟。在对称加密算法中，数据发信方将明文（原始数据）和加密密钥（mi yao）一起经过特殊加密算法处理后，使其变成复杂的加密密文发送出去。收信方收到密文后，若想解读原文，则需要使用加密用过的密钥及相同算法的逆算法对密文进行解密，才能使其恢复成可读明文。在对称加密算法中，使用的密钥只有一个，发收信双方都使用这个密钥对数据进行加密和解密，这就要求解密方事先必须知道

With the development of the computer science, software security captures more people's attention recently. To find the vulnerability and the malicious code, static analysis is an efficient method wher

之前学习TrustZone，这种ARM的机制是虚拟出两个相互隔离的区域，并分别运行安全系统和普通系统。然后就一直有一个疑问，这种虚拟是如何实现。今天看了hypervisor虚拟机技术，总算有了大概的了解。 虚拟机技术是通过对计算机资源（内存，CPU等）的分区和组合，使得这些资源表现为一个或多个操作环境。也就是说通过对原有的硬件资源进行分组，在每个组上分别运行一个独立的操作系统，从而使得资源能得到

Experimental Security Analysis of a Modern Automobile OverView Modern automotives are no longer mere mechanical devices, they are controled by dozens of digital computers via internal networks.

ARM TrustZone and KVM  1. TrustZone Overview ARM TrustZone is a hardware based technology to enhance the security that is used on billions of chips. This new architecture allows CPU to run in

Software Security Overview As the development of the computer, electric science and technology has permeated into every aspect of our life. Meanwhile, security problems generally come into peopl