@inproceedings{pet07-guha:dnsidtrail,
    author    = "Saikat Guha and Paul Francis",
    title     = "{Identity Trail: Covert Surveillance Using DNS}",
    booktitle = "{Proceedings of the Privacy Enhancing Technologies Symposium (PET '07)}",
    year      = "2007",
    month     = "Jun",
    address   = "Ottawa, Canada",
}