Addressing With an Improved DAD for 6LoWPAN

In the existing DAD solutions, a new node constructs a target address and broadcasts the complete target address in the network. The target address becomes invalid as long as another node claims that the target address is occupied. An attacker usually takes advantage of this feature and repeatedly makes such a claim in order to prevent a new node from obtaining an address. In order to protect DAD from such an attack, this letter proposes an addressing scheme with an improved DAD for 6LoWPAN. In this scheme, only a part of a target address, instead of a complete address, is broadcasted in the network. In this way, an attacker is unable to see the complete target address, so it cannot claim that the target address is occupied. Moreover, only a part of a target address is broadcasted in the network, so the addressing cost is reduced.