I think it's unpopular, because it is complex and it doesn't address privacy (between you and your ISP at least).
Centralized, hierarchical PKI is ok here, because it is better than what we have now (600 CAs for TLS, unsigned DNS, etc.) and nobody has a proposal for a fully decentralized system that ordinary people can understand (as demonstrated by GPG).
Comments
I think it's unpopular, because it is complex and it doesn't address privacy (between you and your ISP at least).
Centralized, hierarchical PKI is ok here, because it is better than what we have now (600 CAs for TLS, unsigned DNS, etc.) and nobody has a proposal for a fully decentralized system that ordinary people can understand (as demonstrated by GPG).