John Zao Stephen T. Kent Joshua Gahm Gregory Troxel Matthew Condell Pam Helinek Nina Yuan Isidro Castineyra A Public-Key Based Secure Mobile IP. 173-184 1997 conf/mobicom/1997 MOBICOM http://doi.acm.org/10.1145/262116.262145 db/conf/mobicom/mobicom1997.html#ZaoKGTCHYC97