An anonymous key generation mechanism and private key distribution protocol in Mobile IPv6 Network is proposed targeting at minimizing the inherent key escrow problem in IBE scheme.This mechanism divides PKG（private key generation） into two disconnected parts

the identity authentication center and private key generation center.The former

running in AAAh（authentication

authorization

and accounting home）

keeps identity lists with all users’ identity information in it

and in charge of verification and sending data certification;the latter

without knowing the identity of MN

owns master private key and generates user private key for ID-verified MN.The protocol effectively resists malicious attacks target at private key generation center.Security analysis results show that the proposed protocol is more efficient than other schemes.