What is the primary purpose of creating a forensic image using a write blocker?

What is the primary purpose of creating a forensic image using a write blocker?

• A. To speed up analysis
• B. To preserve evidence integrity
• C. To compress data
• D. To circumvent security policies

Answer: (B)

The primary idea is to preserve evidence integrity. When you create a forensic image, you want an exact, bit-for-bit copy of the original media so you can analyze it without ever touching or changing the original evidence. A write blocker prevents any data writes to the source drive during the imaging process, so nothing on the medium is altered—no new metadata, timestamps, or file system changes that could taint the evidence. This guarantees that the copy is truly identical to the original, allowing verification through hash comparisons and ensuring the evidence remains admissible and defensible in court. It’s not about speed, data compression, or bypassing policies—the goal is to keep the original intact while you work from a reliable duplicate.

The primary idea is to preserve evidence integrity. When you create a forensic image, you want an exact, bit-for-bit copy of the original media so you can analyze it without ever touching or changing the original evidence. A write blocker prevents any data writes to the source drive during the imaging process, so nothing on the medium is altered—no new metadata, timestamps, or file system changes that could taint the evidence. This guarantees that the copy is truly identical to the original, allowing verification through hash comparisons and ensuring the evidence remains admissible and defensible in court. It’s not about speed, data compression, or bypassing policies—the goal is to keep the original intact while you work from a reliable duplicate.