Microsoft Security, Compliance, and Identity Fundamentals SC-900 Practice Question
A company wants to confirm that a document remains unchanged when it is downloaded from cloud storage. Which characteristic of hashing makes it better suited than encryption for this integrity check?
It creates a fixed-length value that cannot be reversed to the original data.
It uses a public and private key pair to protect data during transit.
It converts data into ciphertext that authorized users can later decrypt.
It relies on the same secret key for both scrambling and descrambling data.
Hashing applies a mathematical function to input data and returns a short, fixed-length value (the hash, or message digest). Because the process is one-way, any change to the original data produces a completely different hash, allowing quick verification that data is unaltered. Encryption focuses on confidentiality and is designed to be reversed (decrypted) with the correct key, so it is not inherently ideal for simple integrity comparisons.
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Microsoft Security, Compliance, and Identity Fundamentals SC-900
Describe the concepts of security, compliance, and identity
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