Purdue Federal Credit Union
At the center of the Internet, major ISPs use the Border Gateway Protocol (BGP) to propagate information about Internet destinations and how to reach them. Despite decades of research, BGP problems still exist. In particular, the Internet has a long history of hijacking incidents in which an ISP uses BGP to advertise an incorrect path for a given destination, causing traffic to be diverted away from the destination to the advertising ISP. This paper considers the problem of defending BGP against both unintended and intentional hijacking attacks.