Virtual Labs

What is a covert channel in a computer system?

a: An authorized method of data communication Explanation

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b: An unintended communication path that allows information leakage Explanation

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c: A secure encryption mechanism Explanation

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d: A firewall rule for access control Explanation

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Which of the following best describes information leakage?

a: Authorized sharing of encrypted data Explanation

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b: Loss of data due to system failure Explanation

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c: Unintended exposure of sensitive information Explanation

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d: Secure data backup operation Explanation

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What is the key characteristic of a storage covert channel?

a: Use of execution delays to transmit data Explanation

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b: Transmission of encrypted messages Explanation

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c: Modification of a shared resource state to convey information Explanation

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d: Use of network protocols for communication Explanation

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In this experiment, how is the storage covert channel implemented?

a: By encrypting database records Explanation

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b: By modifying the presence or absence of records in a shared database table Explanation

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c: By increasing network latency Explanation

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d: By blocking user permissions Explanation

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What is the defining feature of a timing covert channel?

a: Use of shared files for communication Explanation

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b: Encoding information using system response time variations Explanation

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c: Explicit message passing between processes Explanation

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d: Modification of access control rules Explanation

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Why are timing covert channels difficult to detect?

a: They use encrypted data packets Explanation

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b: They rely on secure authentication mechanisms Explanation

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c: Timing variations can occur naturally during normal system operation Explanation

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d: They require specialized hardware Explanation

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Covert Channels and Information Leakage