If at first you don't succeed, ...

The plan, known as eDNA, called for developing a new
version of the Internet that would include enclaves where
it would be impossible to be anonymous while using the
network. The technology would have divided the Internet
into secure "public network highways," where a computer
user would have needed to be identified, and "private
network alleyways," which would not have required
identification.

Agency Weighed, but Discarded, Plan Reconfiguring the Internet