What tools are commonly used to detect steganography in JPEG images, and how do they work?

Key detection tools include **Stegdetect**, which analyzes statistical anomalies from steganography algorithms like JSteg and JPHide, and **JPEGsnoop**, which parses JPEG markers, COM comments, DQT tables, and Exif data to uncover hidden data. For example, JPEGsnoop can reveal added COM comments or suspicious quantization values. The article demonstrates its ability to detect manually added Exif fields. These methods complement techniques like advanced exploitation of hidden alternative data streams, but focus specifically on JPEG format analysis.