Key;
Laboratory;
of;
Computer;
Networks;
and;
Information;
Security;
of;
MOE,;
Xidian;
University,;
Xi'an;
710071,;
China;
Beijing;
Information;
Technology;
Institute,;
Beijing;
100101,;
China;
China;
Electronics;
Standardization;
Institute,;
Beijing;
100007,;
China;
Iris; 生物测定; 数字多媒体; 多媒体内容保护; 认证;