https://blogs.verisign.com/ssl-blog/2008/12/on_md5_vulnerabilities_and_mit.php
http://www.win.tue.nl/hashclash/SoftIntCodeSign/
http://www.win.tue.nl/hashclash/rogue-ca/
http://www.securityfocus.com/bid/33065
http://www.securityfocus.com/archive/1/archive/1/499685/100/0/threaded
http://www.phreedom.org/research/rogue-ca/
http://www.microsoft.com/technet/security/advisory/961509.mspx
http://www.doxpara.com/research/md5/md5_someday.pdf
http://blogs.technet.com/swi/archive/2008/12/30/information-regarding-md5-collisions-problem.aspx
http://blog.mozilla.com/security/2008/12/30/md5-weaknesses-could-lead-to-certificate-forgery/