User authentication mechanisms in Operating Systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the common factor used in password authentication.

Operating Systems

Authentication often requires a [1] that only the user knows.

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Apassword

Busername

Cemail

DIP address

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing username with password.

Thinking email is used for authentication instead of identification.

The password is a secret known only to the user, used to verify identity.

2fill in blank

medium

Complete the code to specify a type of authentication that uses physical characteristics.

Operating Systems

Biometric authentication uses [1] like fingerprints or facial recognition.

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Abiometrics

Btokens

Cpasswords

DPINs

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing passwords or PINs which are knowledge-based, not physical.

Confusing tokens with biometrics.

Biometrics are unique physical traits used to verify identity.

3fill in blank

hard

Fix the error in the statement about multi-factor authentication.

Operating Systems

Multi-factor authentication requires [1] types of credentials from different categories.

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Aone

Btwo

Cthree

Dfour

Attempts:

3 left

💡 Hint

Common Mistakes

Thinking only one factor is enough.

Assuming three or more factors are always required.

Multi-factor authentication requires at least two different types of credentials, such as something you know and something you have.

4fill in blank

hard

Fill both blanks to complete the description of a common authentication protocol.

Operating Systems

The [1] protocol uses a [2] to verify user identity over a network.

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AKerberos

Bpassword

COAuth

Dtoken

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing OAuth with Kerberos.

Using password instead of token for network verification.

Kerberos is an authentication protocol that uses tokens (tickets) to verify identity securely over a network.

5fill in blank

hard

Fill all three blanks to complete the explanation of authentication factors.

Operating Systems

Authentication factors include [1] (something you know), [2] (something you have), and [3] (something you are).

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Aknowledge

Bpossession

Cinherence

Dlocation

Attempts:

3 left

💡 Hint

Common Mistakes

Including location as a main factor.

Mixing up possession and inherence.

The three main authentication factors are knowledge (like passwords), possession (like security tokens), and inherence (biometrics).