@InProceedings{	  palsberg00experience,
  author =	 {J. Palsberg and S. Krishnaswamy and Kwon Minseok and
                  D. Ma and Qiuyun Shao and Y. Zhang},
  title =	 {Experience with software watermarking},
  booktitle =	 {Proceedings of the 16th Annual Computer Security
                  Applications Conference, ACSAC '00},
  year =	 2000,
  pages =	 {308--316},
  publisher =	 {IEEE},
  url =
                  {http://www.cs.purdue.edu/homes/madi/wm/watermarking.ps},
  cache =	 {palsberg00.ps},
  abstract =	 {There are at least four U.S. patents on software
                  wa-termarking, and an idea for further advancing the
                  state of the art was presented in 1999 by Collberg
                  and Thom-borsen. The new idea is to embed a
                  watermark in dynamic data structures, thereby
                  protecting against many program-transformation
                  attacks. Until now there have been no re-ports on
                  practical experience with this technique. We have
                  implemented and experimented with a water-marking
                  system for Java based on the ideas of Collberg and
                  Thomborsen. Our experiments show that watermark-ing
                  can be done efficiently with moderate increases in
                  code size, execution times, and heap-space usage,
                  while making the watermarked code resilient to a
                  variety of program-transformation attacks. For a
                  particular representation of watermarks, the time to
                  retrieve a watermark is on the order of one minute
                  per megabyte of heap space. Our implemen-tation is
                  not designed to resists all possible attacks; to do
                  that it should be combined with other protection
                  techniques such as obfuscation and tamperproofing.},
  annote =	 {Describes results of gathered from using an
                  implementation of the Collberg Thomborson algorithm
                  to watermark some Java programs. The paper has a
                  good detailed description of the design desicions
                  and data structures used in building the
                  watermarking system as well as the spacetime
                  overhead of watermarks. Although, it discusses
                  possible attacks and methods of tamperproofing
                  against them, the authors do not consider the
                  resilence of their watermark under any of these
                  named attacks.},
  keywords =	 {java, software watermark},
  section = {SOFTWARE-WATERMARKING}
}