Which of the following tools is used to attack the Digital Watermarking?

Steg-Only Attack describes a type of attack where the attacker only knows that steganography is being used, not a specific tool.

Active Attacks is a broad category of attacks that involve modifying data or systems, not a specific tool for watermarking.

2Mosaic is a known tool used for attacking digital watermarks by manipulating image data to undermine the integrity or presence of the watermark.

Gifshuffle is a steganography tool used to embed data within GIF images, not a tool for attacking watermarks.