To preserve digital evidence, an investigator should make two copies of each evidence item using different imaging tools.

To preserve digital evidence, an investigator should make two copies of each evidence item using different imaging tools.

• A. Make two copies of each evidence item using a single imaging tool
• B. Make a single copy of each evidence item using an approved imaging tool
• C. Make two copies of each evidence item using different imaging tools
• D. Only store the original evidence item

Answer: (C)

The main concept being tested is preserving digital evidence so its integrity can be independently verified. Creating two independent images of each item using different imaging tools provides redundancy and cross-verification. If one tool has a bug, or misses some data, the other image gives a means to confirm or reveal it. Using different tools also reduces the risk that tool-specific artifacts or reporting quirks go unnoticed, which strengthens the defensibility of the evidence. In practice, after imaging you’d verify integrity by calculating cryptographic hashes for each copy and ensuring they match across tools, confirming that both copies are exact bit-for-bit replicas of the original. This approach supports the chain of custody and admissibility by demonstrating that the evidence was preserved accurately and independently. Using two copies with the same tool offers less protection against tool-specific issues, a single copy provides no redundancy, and storing only the original risks alteration or loss. Two independent images with different tools is the most robust option.

The main concept being tested is preserving digital evidence so its integrity can be independently verified. Creating two independent images of each item using different imaging tools provides redundancy and cross-verification. If one tool has a bug, or misses some data, the other image gives a means to confirm or reveal it. Using different tools also reduces the risk that tool-specific artifacts or reporting quirks go unnoticed, which strengthens the defensibility of the evidence.

In practice, after imaging you’d verify integrity by calculating cryptographic hashes for each copy and ensuring they match across tools, confirming that both copies are exact bit-for-bit replicas of the original. This approach supports the chain of custody and admissibility by demonstrating that the evidence was preserved accurately and independently.

Using two copies with the same tool offers less protection against tool-specific issues, a single copy provides no redundancy, and storing only the original risks alteration or loss. Two independent images with different tools is the most robust option.