%% You should probably cite draft-ietf-tls-encrypt-then-mac instead of this I-D.
@techreport{gutmann-tls-encrypt-then-mac-01,
    number =    {draft-gutmann-tls-encrypt-then-mac-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-gutmann-tls-encrypt-then-mac/01/},
    author =    {Peter Gutmann},
    title =     {{Encrypt-then-MAC for TLS}},
    pagetotal = 5,
    year =      2013,
    month =     mar,
    day =       21,
    abstract =  {This document describes a means of negotiating the use of the encrypt-then-MAC security mechanism in place of TLS' existing MAC- then-encrypt one, which has been the subject of a number of security vulnerabilities over a period of many years.},
}