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 also offers an 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 solves the problem of fake accounts by making you ‘prove’ your online identity - twitter, github, etc. Essentially, you are claiming your accounts and hence your identity. Once you do this, people can feel comfortable sending you messages even if they haven’t met you IRL. This is also known as the Web of Trust. You will have to post something on twitter, github gists, etc to tell everyone that you control these accounts.

Keybase also has a file system of its own called KBFS. In simple terms, it’s a secure way of file sharing. There are two types of folders - public and private. Everything in your public folder is signed by you and private folders are end-to-end encrypted which means even Keybase can’t see them!

Keybase is a messaging platform where:
* you can write securely to any twitter, reddit, facebook, github, and hacker news user
* you don't need to know someone's phone number or email address
* all messages are secure, end-to-end encrypted
* multi-device: your messages survive and transfer with encryption to new phones & computers

Keybase is so much more. It is:
* free for everyone, and free of ads
* open source (https://github.com/keybase/client)
* multi-platform, w/apps for macOS, Linux, and Windows (https://keybase.io/download)


Keybase.io Introduction and Basic Features (YouTube Video)