Two-factor authentication in Intro to Computing - Flowchart & Logic Diagram

Process Overview

Two-factor authentication (2FA) is a security process that requires users to provide two different types of information to verify their identity before accessing an account or system. This adds an extra layer of protection beyond just a password.

Flowchart

Rectangle

Yes No↓

Rectangle

↓

Rectangle

Yes No↓

Rectangle

↩No path loops back to start for retry

This flowchart shows the step-by-step process of two-factor authentication, starting from user login, checking password, sending a code, verifying the code, and granting access.

Step-by-Step Trace - 6 Steps

Step 1: User enters username and password

Step 2: System checks if username and password are correct

Step 3: System sends a 2FA code to the user's device

Step 4: User enters the 2FA code received

Step 5: System checks if the 2FA code is correct

Step 6: System grants access to the user

Diagram

User Device
+------------+
|            |
|  Phone/App |
|  receives  |
|  2FA code  |
+------------+
      |
      v
+-----------------+       +-------------------+
| User enters 2FA  |-----> | System verifies    |
| code on website  |       | code correctness   |
+-----------------+       +-------------------+
      |
      v
+-----------------+
| Access granted   |
+-----------------+

This diagram shows the flow of the 2FA code from the system to the user's device and back to the system for verification before granting access.

Flowchart Quiz - 3 Questions

What is the first step in two-factor authentication?

A System sends 2FA code

B User enters username and password

C User enters 2FA code

D System grants access

Key Result

Two-factor authentication strengthens security by requiring both something you know (password) and something you have (a code from your device).