%% You should probably cite draft-ietf-oauth-v2-http-mac-05 instead of this revision.
@techreport{ietf-oauth-v2-http-mac-03,
    number =    {draft-ietf-oauth-v2-http-mac-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-oauth-v2-http-mac/03/},
    author =    {Justin Richer and William Mills and Hannes Tschofenig},
    title =     {{OAuth 2.0 Message Authentication Code (MAC) Tokens}},
    pagetotal = 26,
    year =      2013,
    month =     feb,
    day =       25,
    abstract =  {This specification describes how to use MAC Tokens in HTTP requests to access OAuth 2.0 protected resources. An OAuth client willing to access a protected resource needs to demonstrate possession of a crytographic key by using it with a keyed message digest function to the request. The document also defines a key distribution protocol for obtaining a fresh session key.},
}