**6. Detection test against copy-paste attack**

In the second attack, we copied an object "coca-cola bottle" and then pasted it into the watermarked video (**Figure 10a**). When we extracted the watermarks from the

**Figure 10.**

*(a) Watermarked frame after copy-paste attack; (b) extracted watermark; (c) and (d) detected tampering region.*

video, we got an extracted watermark as shown in **Figure 10b**. The extracted watermark contains a silhouette of strange object inside. Localize the tampered region and we can detect copy-paste object in the video frames as shown in **Figure 10c** and **d**.
