Password Authentication using Python

Password Authentication is the process of checking the identity of a user. Almost every online platform today makes sure that they only give access to the real user which can be only possible by asking for a password while a user wants to log in to the account. So in this article, I will take you through the task of password authentication using Python.

What is a Password Authentication System?

A password authentication system is a system that is used for the identification of a user. Think of it like a login screen that you see while logging in to your Facebook account. It asks for your email or a username and then it asks for your password. If you have entered the correct password then it verifies you as the real user.

Creating a logic-based password authentication system is also a popular question in the coding interviews. So, in the section below, I will take you through how to create a password authentication system using Python.

Password Authentication using Python

To create a password authentication system using Python you have to follow the steps mentioned below:

  1. Create a dictionary of usernames with their passwords.
  2. Then you have to ask for user input as the username by using the input function in Python.
  3. Then you have to use the getpass module in Python to ask for user input as the password. Here we are using the getpass module instead of the input function to make sure that the user doesn鈥檛 get to see what he/she write in the password field.

So let鈥檚 follow the steps mentioned above to create a password authentication system using Python:

Enter Your Username : aman.kharwal
Enter Your Password : 路路路路路路路路路路
Enter Your Password Again : 路路路路路路路路路路
Enter Your Password Again : 路路路路路路路路路路
Verified

Summary

So this is how we can authenticate the identity of a user by using the Python programming language. Now you can try the same logic with more usernames and other data structures also. I hope you liked this article on how to create a password authentication system using Python. Feel free to ask your valuable questions in the comments section below.

Aman Kharwal
Aman Kharwal

I'm a writer and data scientist on a mission to educate others about the incredible power of data馃搱.

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3 Comments

  1. Why not this instead?

    while True:
    if password == database[username]:
    break
    else:
    password = getpass.getpass(鈥淓nter Your Password Again : 鈥)
    print(鈥淰erified鈥)

    • we can use both get function and [key] which brings values but get function is more effective when we don鈥檛 want to face error.

      • import getpass
        database={鈥榦mar123鈥:鈥12356鈥, 鈥榖ems01鈥:鈥456789鈥,鈥檇jigabs鈥:鈥1478963鈥瞹
        b=list(database.keys())
        print(b)
        name=input(鈥淓ntrer votre nom d鈥檜tilisateur: 鈥)
        while name not in b:
        name=input(鈥淓ntrer votre nom d鈥檜tilisateur: 鈥)
        pwd=getpass.getpass(鈥淓ntrer votre password: 鈥)
        for i in database.keys():
        if name==i:
        while pwd!=database.get(i):
        pwd=getpass.getpass(鈥淓ntrer encore votre mot de passe: 鈥)
        break
        for x, y in database.items():
        if name==x and pwd==y:
        print(鈥榲erified鈥)

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