I remind the list of Matthew J. Ghio's March 18th FWD of an announcement of a highly efficient electronic cash system created by Stefan Brands <brands@cwi.nl>. The documentation can be obtained from ftp.cwi.nl in pub/brands. I've downloaded it and printed it all out - it's about 100 pages - and very interesting. Walter A. Kehowski <wak@next1.math.pitt.edu>