The Information Forensics and Security Technical Committee of the Signal Processing Society recently organized the 2011 IEEE International Workshop on Information Forensics and Security in picturesque Foz do Iguacu, Brazil, from November 29th to December 2nd, 2011. Third in the series (after WIFS'09 in London, and WIFS'10 in Seattle), this year's workshop again attracted a record number of submissions. The main track received an overwhelming 123 submissions, out of which 40 high-quality papers were selected after rigorous peer review.