R. Housley. <a href="http://www.ietf.org/rfc/rfc3217.txt"><cite>RFC3217: Triple-DES and RC2 Key Wrapping</cite></a>.  IETF Informational RFC, December 2001. URI: <a href="http://www.ietf.org/rfc/rfc3217.txt">http://www.ietf.org/rfc/rfc3217.txt</a>