Jim Fenton wrote:
Some of these have an introduction problem, and others are explicitly opt-in and could solve the problem at opt-in time.
Yes. However, the introduction problem does not have any scalable solution because third parties, such as CAs of PKI, are untrustworthy. > They might even be merged together A conventional wisdom, as was demonstrated by IPv6, is that, if you merge protocols, the result will have all the demerits of original protocols. Masataka Ohta