I don’t know when it started, but it became visible a couple of years ago — ironically, at about the same time that the ’Net neutrality debate started to gain ground. Now it may be the thing that makes that much-more-publicized concept moot. What is it? The notion that perhaps we need to rethink completely the thing we call the Internet.

MIT's David D. Clark sounded an alarm about the Internet’s problems back in about 2004. His major concern is security, an Internet issue that’s become clear to everyone. Clark feels the Internet has an intrinsic security problem that should be solved in a way that’s more fundamental than gluing security on the edges. My own projections seem to confirm his worry: If security costs continue to rise at their current rate and bandwidth costs continue to fall at their current rate, we'll reach a point in the early part of the next decade where we will spend more on security than on the Internet.

Clark also tells a funny story about a fellow professor who remarked to him that the Internet had left out the most important protocol. “What was that?” Clark asked, eager to work on fixing the problem. The professor replied, “The one that routes the money!” That points out the second problem; the Internet well may be the only example of “bill and keep” in any retail system in the world.

What would happen if airlines worldwide flew passengers according to a model where the first airline that passengers board sells them a ticket for the first part of the trip and keeps all the money, but passengers are able to make connections to other airlines and fly anywhere? You can bet that on those connecting airlines you’d get minimal service at best, and not too many would stay in business. Settlement is a part of every wholesale or retail supply chain and every telecom service — except the Internet. As far back as the mid-1990s, ISPs themselves were saying that without settlement there’d never be Internet QoS because the full chain of providers involved in Internet flows couldn’t be compensated for playing their part.

Clark isn’t the only one who’s saying that something new is needed; the topic even is reaching the mainstream print media. The Philadelphia Inquirer ran an article late last month titled “The clean slate way to redo the Internet.” It quoted Rutgers University professor Dipankar Raychaudhuri as saying that the Internet “was designed for completely different assumptions” and that “it’s sort of a miracle that it continues to work well today.”