Chandana Gamage Ben Gras Bruno Crispo Andrew S. Tanenbaum An Identity-based Ring Signature Scheme with Enhanced Privacy. 1-5 2006 SecureComm http://doi.ieeecomputersociety.org/10.1109/SECCOMW.2006.359554 conf/securecomm/2006 db/conf/securecomm/securecomm2006.html#GamageGCT06