%% You should probably cite rfc3686 instead of this I-D.
@techreport{ietf-ipsec-ciph-aes-ctr-05,
    number =    {draft-ietf-ipsec-ciph-aes-ctr-05},
    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-ipsec-ciph-aes-ctr/05/},
    author =    {Russ Housley},
    title =     {{Using Advanced Encryption Standard (AES) Counter Mode With IPsec Encapsulating Security Payload (ESP)}},
    pagetotal = 19,
    year =      2003,
    month =     jul,
    day =       24,
    abstract =  {This document describes the use of Advanced Encryption Standard (AES) Counter Mode, with an explicit initialization vector, as an IPsec Encapsulating Security Payload (ESP) confidentiality mechanism.},
}