The old and insecure MD5 hashing function hasn’t been used to sign SSL/TLS server certificates in many years, but continues to be used in other parts of encrypted communications protocols, including ...

将任意长度的二进制值串映射为固定长度的二进制值串，这个映射的规则就是哈希算法，而通过原始数据映射之后得到的二进制值串就是哈希值。 构成哈希算法的条件： 从哈希值不能反向推导出原始数据（所以哈希算法也叫单向哈希算法） 对输入数据非常敏感 ...

In this chapter we will look at choosing and optimizing cryptographic algorithms, particularly for resource-constrained systems, such as embedded systems. We will look at various strategies for ...