Introduction - If you have any usage issues, please Google them yourself
First we need to understand a mathematical operation, it is called the hash algorithm (hash), which is a reversible operation Ji, Ji through you to solve a result of the operation is unknown how much the original Qie, sometimes we need to Ji by unknown with Qie The algorithm computes the same result obtained Qie, that you too may find the two Ji Ji Qie value by the same hash get the same result. Is a kind of hash algorithm Qie collectively, hash algorithms are usually open Qie, such as MD5, SHA-1, and so on.