I hereby claim:
- I am mcav on github.
- I am mcav (https://keybase.io/mcav) on keybase.
- I have a public key whose fingerprint is 899A 69AF 882F F002 44FE 33A7 9CEF B7B2 BC1D ADC0
To claim this, I am signing this object:
{
    "body": {
        "key": {
            "fingerprint": "899a69af882ff00244fe33a79cefb7b2bc1dadc0",
            "host": "keybase.io",
            "key_id": "9cefb7b2bc1dadc0",
            "kid": "0101dbb7a6ca86729a88c222e13c46181097a60915c06ec240997f749180df06f9da0a",
            "uid": "baf9eecbff31e3d0fcdf9dc820d67319",
            "username": "mcav"
        },
        "service": {
            "name": "github",
            "username": "mcav"
        },
        "type": "web_service_binding",
        "version": 1
    },
    "ctime": 1429657265,
    "expire_in": 157680000,
    "prev": "d5986011bb97d04bdcb752ebd89ede7522e366c3de1ef87659d22b60c54fc8c7",
    "seqno": 2,
    "tag": "signature"
}with the key 899A 69AF 882F F002 44FE 33A7 9CEF B7B2 BC1D ADC0, yielding the signature:
-----BEGIN PGP MESSAGE-----
Version: Keybase OpenPGP v2.0.8
Comment: https://keybase.io/crypto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=HqcX
-----END PGP MESSAGE-----
And finally, I am proving ownership of the github account by posting this as a gist.
Consider the keybase command line program.
# look me up
keybase id mcav
# encrypt a message to me
keybase encrypt mcav -m 'a secret message...'
# ...and more...