What is the minimum number of bit-stream copies recommended for a suspect drive?

What is the minimum number of bit-stream copies recommended for a suspect drive?

• A. 3
• B. 1
• C. 2
• D. 4

Answer: (C)

Preserving evidence integrity and enabling verifiability through duplication and hash verification is the idea behind imaging suspect drives. The minimum is to create two bit-stream copies. One copy is used for actual analysis, while the second serves as an independent verification and backup to guard against errors, tampering, or corruption in a single copy. After imaging, generate cryptographic hashes (such as SHA-256) for both images and compare them; identical hashes confirm that the copies are exact bit-for-bit reflections of the original. Always image with a write blocker to keep the original unaltered, and store the copies separately to reduce the risk of loss or compromise. While sometimes a third copy is created for extra redundancy or court-specific needs, two copies satisfy the basic requirement for reliable, verifiable forensic imaging.

Preserving evidence integrity and enabling verifiability through duplication and hash verification is the idea behind imaging suspect drives. The minimum is to create two bit-stream copies. One copy is used for actual analysis, while the second serves as an independent verification and backup to guard against errors, tampering, or corruption in a single copy. After imaging, generate cryptographic hashes (such as SHA-256) for both images and compare them; identical hashes confirm that the copies are exact bit-for-bit reflections of the original. Always image with a write blocker to keep the original unaltered, and store the copies separately to reduce the risk of loss or compromise. While sometimes a third copy is created for extra redundancy or court-specific needs, two copies satisfy the basic requirement for reliable, verifiable forensic imaging.