Keybase

Keybase is a key directory that maps social media identities to encryption keys (including, but not limited to PGP keys) in a publicly auditable manner. Keybase offers an end-to-end encrypted chat and cloud storage system, called Keybase Chat and the Keybase filesystem respectively. Files placed in the public portion of the filesystem are served from a public endpoint, as well as locally from a filesystem mounted by the Keybase client. Keybase supports publicly connecting Twitter, GitHub, Facebook, Reddit, and Hacker News identities to encryption keys, along with Bitcoin and Zcash wallet addresses. Keybase has supported Coinbase identities since initial public release, but ceased to do so on March 17, 2017 when Coinbase terminated public payment pages.