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The Internet is not a safe place. Unsecured hosts can
expect to be compromised within minutes of connecting
to the Internet. However, while such threats to host
systems are widely understood, it is less well
appreciated that the network infrastructure itself is
subject to constant attack as well. Indeed, through
combinations of social engineering and exploitation
of weak passwords, attackers have seized control over
of thousands of routers. By compromising a router, an
attacker may interpose on the traffic stream and
manipulate it maliciously to attack others:
selectively dropping, modifying or re-routing
packets. This work is an important step in being able
to tolerate such attacks on key network
infrastructure components. This book is based on the
author´´s doctoral research, which is recognized with
the William C. Carter Award, in 2005: "The award is
presented annually since 1997 to recognize an
individual who has made a significant contribution to
the field of dependable computing through his or her
graduate dissertation research. The award is
sponsored by the IEEE Technical Committee on
Fault-Tolerant Computing and the IFIP WG-10.4 on
Dependable Computing and Fault Tolerance."

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