Patrick Bas

Patrick Bas is a CNRS Research Director at theCentre de Recherche en Informatique, Signal et Automatique of Lille(CRIStAL). His research areas include the detection of hidden information (steganalysis), the detection of generated documents, watermarking and the insertion of hidden information into documents (steganography). He completed his PhD on digital image watermarking at GIPSA-Lab in Grenoble in 2000, undertook postdoctoral research at the University of Louvain-la-Neuve in 2001 (Belgium), and then spent three years as a visiting researcher at Aalto University (Finland) until 2007. Since 2008, he has been a member of the CRIStAL laboratory. He devotes part of his research to analysing the security of watermarking and steganography methods. In 2007, Patrick Bas, together with Teddy Furon, organised an international competition to assess the robustness and security of a watermarking technique. In the spring of 2026, they also took part in the working group on the labelling of user-generated content organised by the European Commission as part of the AI Act. Within CRIStAL’s SIGMA team, some of the researchers and lecturer-researchers are currently working on the detection of user-generated content using passive forensic analysis methods, or active methods utilising watermarking.