Holiday Inn University Center, Pittsburgh, PA, USA 25 - 27 April 2001 Preliminary Call for Papers: 4th International Information Hiding Workshop Many researchers are interested in hiding information or, conversely, in preventing others from doing so. As the need to protect digital intellectual property grows ever more urgent, this research is of increasing interest to both the academic and business communities. Current research themes include: copyright marking of digital objects, covert channels in computer systems, detection of hidden information, subliminal channels in cryptographic protocols, low-probability-of-intercept communications, and various kinds of anonymity services ranging from steganography through location security to digital elections. An international workshop on Information Hiding held in 1996 at the Isaac Newton Institute in Cambridge (Springer LNCS 1174) brought together these closely linked areas of study. The workshop proved to be a success, and the research community followed it up with a second one in 1998 in Portland (Springer LNCS 1525) and a third one in 1999 in Dresden (Springer LNCS 1768). Interested parties are invited to submit papers on research and practice which are related to these areas of interest. Claims about information hiding technology must be backed by evidence in the paper and the authors must be prepared to publicly discuss such claims at the workshop. Submissions must be made electronically, preferably as a pdf file (non-color) of no more than 15 pages, in the Springer LNCS series format with the addition of page numbers (TeX/LaTeX output highly recommended). Submissions should be sent to the program chair, Ira Moskowitz, at ihw@itd.nrl.navy.mil Paper submission: 7 December 2000 (tentative) Notification of acceptance: 12 February 2001 (tentative) Camera-ready copy for preproceedings: 22 March 2001 (tentative) Camera-ready copy for proceedings: 24 May 2001 (tentative) The proceedings will be published after the workshop by Springer in their LNCS Series. Program committee: Ross Anderson (Cambridge University, UK) David Aucsmith (Intel Corp, USA) Jean-Paul Linnartz (Philips Research, Netherlands) Steven Low (University of Melbourne, Australia) John McHugh (SEI/CERT, USA) - General Chair Ira Moskowitz (Naval Research Laboratory, USA) - Program Chair Fabien Petitcolas (Microsoft Research, UK) Andreas Pfitzmann (Dresden University of Technology, Germany) Jean-Jacques Quisquater (Universit'e Catholique de Louvain, Belgium) Further information can be obtained at http://chacs.nrl.navy.mil/IHW2001 or by contacting the program chair at ihw@itd.nrl.navy.mil