hpcsyspros19.bib

@article{xie2013fast,
  title={Fast Collision Attack on MD5.},
  author={Xie, Tao and Liu, Fanbao and Feng, Dengguo},
  journal={IACR Cryptology ePrint Archive},
  volume={2013},
  pages={170},
  year={2013},
  publisher={Citeseer}
}

@article{diffie1977special,
  title={Special feature exhaustive cryptanalysis of the NBS data encryption standard},
  author={Diffie, Whitfield and Hellman, Martin E},
  journal={Computer},
  volume={10},
  number={6},
  pages={74--84},
  year={1977},
  publisher={IEEE}
}

@article{m2011totp,
  title={Totp: Time-based one-time password algorithm},
  author={M’Raihi, David and Machani, Salah and Pei, Mingliang and Rydell, Johan},
  journal={Internet Request for Comments},
  year={2011}
}

@misc{habets2011,
  title={OpenSSH certificates},
  url={https://blog.habets.se/2011/07/OpenSSH-certificates.html},
  journal={Blargh},
  publisher={habets.se},
  author={Habets, Thomas},
  year={2011},
  month={Jul}
}

@manual{redhat2019,
  title  = {Creating SSH CA Certificate Signing Keys},
  author = {Red Hat, Inc.},
  url    = {https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/sec-creating_ssh_ca_certificate_signing-keys},
  year   = {2019}
}

@misc{authy,
  title = {Authy},
  url = {https://authy.com/},
  author = {Twilio, Inc.},
  year   = {2019}
}

@misc{gauth,
   author = {Wikipedia contributors},
   title = {Google Authenticator},
   year = {2019},
   url = {https://en.wikipedia.org/wiki/Google_Authenticator},
 }

@misc{linotp,
 author = {KeyIdentity GmbH},
 title = {{LinOTP}},
 year = {2019},
 url = {https://www.linotp.org/}
 }

@misc{openssh,
 author = {OpenSSH},
 title = {{OpenSSH 3.9 Release Notes}},
 year = {2004},
 month = {08},
 day = {18},
 url = {https://www.openssh.com/txt/release-3.9}

}