In addition to GPG, I would like to draw attention to the Namecoin project.

It is a distributed name system suitable for domain names (aka .bit domains) and personal identity and public key distribution, and a number of other emergent applications. It has inherent censorship resistance and provable trust properties. There are already several node implementations including a browser plugin. Work is ongoing.

I believe the future of the free internet will depend on a peer-to-peer DNS of some type, and we owe it to the future to explore all technically valid options. The current hierarchical system is already untenable in many places, and is on its way the remainder:

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posted by mnp 3 years and 10 months ago Link