Daojing He Sammy Chan A Secure and Lightweight User Authentication Scheme with Anonymity for the Global Mobility Network. 305-312 2010 NBiS https://doi.org/10.1109/NBiS.2010.34 https://doi.ieeecomputersociety.org/10.1109/NBiS.2010.34 conf/nbis/2010 db/conf/nbis/nbis2010.html#HeC10