Which overlay type is highly secure?

• A. Off-the-shelf overlays
• B. Secure - medium detail graphics
• C. Highly secure - ultimate detail graphics, allows for visual security elements and maximum design complexity and high resolution
• D. Random placement overlays

Answer: (C)

The main concept here is that overlay security scales with the amount of detail, design complexity, and built‑in visual security features. The highly secure option is best because it explicitly offers ultimate detail graphics, maximum design complexity, high resolution, and the ability to incorporate visual security elements. This combination makes the overlay much harder to replicate and harder to defeat, providing stronger protection against counterfeiting.

The other options don’t convey the same level of protection: off‑the‑shelf overlays are generic and easier to copy; medium detail graphics provide some security but not at the top level; random placement overlays might be unpredictable but typically lack the comprehensive, high‑resolution security features that deliver the strongest deterrence.