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Namecoin

Namecoin is an experimental open-source blockchain technology for decentralized, censorship-resistant names, DNS, and identities. It provides the .bit naming system, Namecoin wallets and clients, and supporting software for secure name resolution and TLS validation.
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Description

Namecoin is an open-source, Bitcoin-based key/value registration and transfer system that records names and associated data on a blockchain. It operates decentralized .bit DNS and identity-related infrastructure intended to improve censorship resistance, privacy, security, and speed for Internet naming. The project provides downloadable Namecoin Core clients, ncdns software for resolving .bit domains, and documentation for name owners, wallets, mining, and TLS integration.