Description: Design a simulation of the system users safe login procedures, the use of MD5 algorithm to achieve the user login password security certification. The program has two functions: registration and login. The user registration function prompts the user to enter the user name and password, and realize the one-to-one correspondence between the MD5 hash value of the user name and user password. User login function, prompting the user to enter the user name and password, the user input after the password is correct, given the legitimate user prompt otherwise give the illegal user prompt.
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md5.doc