Hash functions in digital forensics are used for file integrity verification, and which statement about their status is accurate?

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Multiple Choice

Hash functions in digital forensics are used for file integrity verification, and which statement about their status is accurate?

Explanation:
Hash functions create a small, fixed-size fingerprint of data that uniquely (in practice) represents its contents. In digital forensics, this fingerprint is used to prove a file hasn’t changed since it was collected: you compute the hash on the original evidence, store it, and later recompute the hash to see if it matches. If the values match, integrity is preserved; if they don’t, the file has been altered. They do not provide encryption or confidentiality, and they aren’t meant to replace encryption. Regarding status, while MD5 and SHA-1 are known to have collision weaknesses and are generally discouraged for security purposes, hash functions remain a tool for integrity verification. SHA-256 is a strong, widely used option today. But the essential point is that hash functions are used to verify integrity.

Hash functions create a small, fixed-size fingerprint of data that uniquely (in practice) represents its contents. In digital forensics, this fingerprint is used to prove a file hasn’t changed since it was collected: you compute the hash on the original evidence, store it, and later recompute the hash to see if it matches. If the values match, integrity is preserved; if they don’t, the file has been altered.

They do not provide encryption or confidentiality, and they aren’t meant to replace encryption. Regarding status, while MD5 and SHA-1 are known to have collision weaknesses and are generally discouraged for security purposes, hash functions remain a tool for integrity verification. SHA-256 is a strong, widely used option today. But the essential point is that hash functions are used to verify integrity.

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