4. Security Considerations

The purpose of this document is to deprecate a feature of IPv6 that has been shown to have undesirable security implications. Specific examples of vulnerabilities that are facilitated by the availability of RH0 can be found in [CanSecWest07] and [RFC 5095].

The deprecation of RH0 will not prevent all possible traffic amplification attacks in IPv6. It will, however, significantly reduce the opportunities for traffic amplification by removing the ability to specify multiple intermediate destinations in a single packet.