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Mobile Internet Protocol version 6 (MIPv6) is currently defined with a security solution called Return Routability that provides the Mobile node with an authentication mechanism and protects the BU signals between the Mobile node and the Correspondent node. MIPv6 also proposes the use of the Internet Protocol Security (IPSec) between the Mobile node and its Home Agent to protect the BU signals between them. While IPSec may offer strong protection, the use of IPSec with Return Routability does not necessarily cover all areas of security. Return Routability remains vulnerable to attacks. The main objective of this paper is to design a new security protocol to provide higher levels of authentication and security for MIPv6. This security protocol has to provide a level of security and authentication higher than exists in the current mechanism, Return Routability. Additionally, the new proposed security protocol will …