Passwords and authentication best practices in Intro to Computing - Flowchart & Logic Diagram

Process Overview

This flowchart shows the step-by-step process of creating and using strong passwords and authentication methods to keep accounts safe. It guides through choosing a strong password, verifying it, and using additional security steps like two-factor authentication.

Flowchart

Choose a password

↓

Use password

↓

Set up 2FA

↓

Login attempt

↓

Verify 2FA code

↓

Access granted

This flowchart shows the process of selecting a strong password, deciding to enable two-factor authentication (2FA), and verifying credentials during login to ensure secure access.

Step-by-Step Trace - 12 Steps

Step 1: User chooses a password.

Step 2: Check if the password is strong.

Step 3: User chooses a stronger password.

Step 4: Check if the password is strong.

Step 5: Decide whether to enable two-factor authentication (2FA).

Step 6: Set up 2FA method (e.g., phone app).

Step 7: User attempts to log in with password.

Step 8: Check if password is correct.

Step 9: Check if 2FA is enabled.

Step 10: User enters 2FA code from device.

Step 11: Check if 2FA code is correct.

Step 12: Access granted to user.

Diagram

 +-------------------+       +-------------------+       +-------------------+
 |                   |       |                   |       |                   |
 |  User chooses     |       |  Password stored   |       |  2FA device/app   |
 |  password         |       |  securely          |       |  generates codes  |
 |                   |       |                   |       |                   |
 +---------+---------+       +---------+---------+       +---------+---------+
           |                           |                           |
           |                           |                           |
           +---------------------------+---------------------------+
                                       |
                               +-------v-------+
                               |               |
                               |  Authentication|
                               |  System       |
                               |               |
                               +-------+-------+
                                       |
                               +-------v-------+
                               |               |
                               |  Access       |
                               |  Granted or   |
                               |  Denied      |
                               +---------------+

This diagram shows how the user chooses a password stored securely, optionally sets up a 2FA device that generates codes, and how the authentication system checks both to grant or deny access.

Flowchart Quiz - 3 Questions

What should you do if your chosen password is weak?

A Skip password and use only 2FA

B Use the weak password anyway

C Choose a stronger password with letters, numbers, and symbols

D Write the password on a sticky note

Key Result

Strong passwords combined with two-factor authentication greatly improve account security by requiring multiple proofs of identity.

Practice

1. Which of the following is the best practice for creating a strong password?

easy

A. Use your username as the password

B. Use only your birthdate

C. Use a simple word like 'password'

D. Use a mix of letters, numbers, and symbols

Solution

1. Step 1: Understand password strength factors

   A strong password includes a mix of letters, numbers, and symbols to make it hard to guess.

2. Step 2: Evaluate each option

   The other options use easily guessable information like birthdates, simple words, or usernames, making them weak passwords.

3. Final Answer:

   Use a mix of letters, numbers, and symbols -> Option D

4. Quick Check:

   Strong password = mix of characters [OK]

Hint: Strong passwords mix letters, numbers, and symbols [OK]

Common Mistakes:

• Using only simple words or personal info
• Ignoring symbols and numbers
• Reusing the same password everywhere

2. Which of the following is the correct way to enable two-factor authentication (2FA)?

easy

A. Use only a password without any extra step

B. Enter a password and then a code sent to your phone

C. Use your password twice in a row

D. Share your password with a friend for backup

Solution

1. Step 1: Understand two-factor authentication

   2FA requires two steps: something you know (password) and something you have (code from phone).

2. Step 2: Check each option

   Only Enter a password and then a code sent to your phone describes entering a password plus a code sent to your phone, which is correct 2FA.

3. Final Answer:

   Enter a password and then a code sent to your phone -> Option B

4. Quick Check:

   2FA = password + code [OK]

Hint: 2FA means password plus a code from your device [OK]

Common Mistakes:

• Thinking 2FA is just repeating the password
• Sharing passwords with others
• Skipping the second authentication step

3. Consider this scenario: You create a password 'P@ssw0rd123' and enable 2FA. What is the main benefit of enabling 2FA?

medium

A. It adds an extra layer of security beyond the password

B. It allows password sharing safely

C. It makes the password shorter

D. It removes the need to remember the password

Solution

1. Step 1: Analyze the role of 2FA

   2FA adds a second step to verify identity, making unauthorized access harder.

2. Step 2: Evaluate options

   Only It adds an extra layer of security beyond the password correctly states that 2FA adds extra security beyond just the password.

3. Final Answer:

   It adds an extra layer of security beyond the password -> Option A

4. Quick Check:

   2FA = extra security layer [OK]

Hint: 2FA adds security beyond just the password [OK]

Common Mistakes:

• Thinking 2FA shortens passwords
• Believing 2FA allows safe password sharing
• Assuming 2FA removes password need

4. You wrote a password policy that requires users to create passwords with at least 8 characters, but you forgot to include numbers or symbols. What is the main issue with this policy?

medium

A. Users will be forced to use 2FA

B. Passwords will be too complex to remember

C. Passwords may be weak because they lack variety

D. Passwords will always be secure

Solution

1. Step 1: Understand password complexity

   Passwords need variety (letters, numbers, symbols) to be strong, not just length.

2. Step 2: Analyze the policy

   The policy only requires length, missing variety, so passwords may be weak.

3. Final Answer:

   Passwords may be weak because they lack variety -> Option C

4. Quick Check:

   Password strength = length + variety [OK]

Hint: Length alone doesn't ensure strong passwords [OK]

Common Mistakes:

• Assuming length alone makes passwords strong
• Forgetting to require symbols or numbers
• Confusing 2FA with password complexity

5. You manage a website login system. To improve security, you want to implement a policy that forces users to update their passwords every 90 days and use 2FA. Which of the following best explains why this combination is effective?

hard

A. Regular password changes reduce risk if passwords are stolen; 2FA adds a second verification step

B. Frequent password changes make users forget passwords; 2FA removes the need for passwords

C. Password updates and 2FA both replace the need for strong passwords

D. This policy allows users to share passwords safely with 2FA

Solution

1. Step 1: Understand password update benefits

   Changing passwords regularly limits the time stolen passwords can be used.

2. Step 2: Understand 2FA benefits

   2FA adds a second verification step, making unauthorized access harder even if password is known.

3. Step 3: Combine both concepts

   Together, they reduce risk from stolen passwords and add extra security layers.

4. Final Answer:

   Regular password changes reduce risk if passwords are stolen; 2FA adds a second verification step -> Option A

5. Quick Check:

   Password updates + 2FA = stronger security [OK]

Hint: Update passwords often and use 2FA for best security [OK]

Common Mistakes:

• Thinking 2FA removes need for passwords
• Believing frequent changes cause security issues
• Assuming password sharing is safe with 2FA