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tariqasgharUX Design Techdegree Graduate 30,519 Points
How is check password able to return True?
Isn't "check password hash" function doing the same thing as before i.e. comparing both arguments passed?
Jeff MudayTreehouse Moderator 27,497 Points
That is a smart observation. If we simply hashed the password, you would be correct.
generate_password_hash() hashes the password first and then applies a "random" salt.
In some schemes, the salt is stored alongside the hash but in this case, it is randomly generated (this is the "rounds" parameter Kenneth mentions) and combined with the password. When we use
check_password_hash() the function takes a password candidate and compares it to the hashed password in the database and tries a number of possible candidate salt combinations.
The combination of password hashing and salting makes dictionary (or rainbow) attacks less likely to succeed.