On-demand key management based on social attribute for opportunistic networks
CHEN Xi1;2;LI Guang-song3;TIAN You-liang1;MA Jian-feng1;Xidian University;Xi’an 710071;China;2.The Twentieth Research Institute of China Electronics Technology Group Corporation;Xi’an 710068;China;3.Department of Information Research;PLA Information Engineering University;Zhengzhou 450002;China)