Thinking about denial of service in Internet protocols

Many critical services have become dependent on the Internet as a communication medium. This has highlighted the vulnerability of the Internet to denial-of-service attacks. While the TPC/IP protocol stack was never intended to provide guaranteed quality of service, many of the vulnerabilities are simple accidents and make it unnecessarily easy for DoS attackers to reach their goals. In this talk, I suggest that DoS-resistance is becoming a key requirement for all network protocols and draw examples mostly from the design of mobility protocols.