What are the challenges with using the Internet today for business communications?

CERF: The Internet continues to be challenged by viruses, worms and Trojan horses, [and] denial-of-service attacks against hosts and infrastructure. It has adapted to provide virtual private network access for businesses, but firewalls and network address translation devices sometimes interfere with VPNs, packet voice services and the like. Authentication of users is still a challenge, and there is a need for more end-to-end confidentiality. Deployment of IPv6 is still slow in most of the network. The problems are severe and lie at several layers in the protocol hierarchy as well as in the quality of the operating system software that is so readily penetrated. Operating system and application system designers have not taken into account adequate measures for authentication for purposes of access control, leaving many systems open to exploitation.

KAHN: Security was something that we thought about in the early days, but there were so many obstacles to trying to deploy strong security that we just didn't go down that path. I wouldn't say there's no security but ... it could be better. I would like to see the whole issue of identity management addressed so you can authenticate information when you get it. But I don't know [that] that's a limitation. It's just an aspiration for something that could be better.

PARULKAR: If you look at mobile wireless, the Internet was not designed for this degree of mobility. The IP address is identical to an attachment point where you interface to the network. When people are constantly moving, your attachment point is constantly changing. So there is this issue of, can you continue to use IP addresses with this architecture, or can you do better by decoupling those two things? You may have to have another level of addressing.

How will those problems be fixed?