|  Krutz, Ronald, and Russell Dean Vines. The CISSP Prep Guide: Mastering the Ten Domains of Computer Security . John Wiley & Sons. Indianapolis, IN, 2001. ISBN 0471413569. Housley, Russ, and Tim Polk. Planning for PKI . John Wiley & Sons. New York, NY, 2001. ISBN 0471397024.  The PKI X. 509 PKIX Charter Web page: www.ietf.org/html. charters /pkix-charter.html The International Telecommunications Union Web site: www.itu.int/rec/recommendation.asp?type=products&lang=e&parent=T-REC-X The RSA Corporation "Public Key Cryptography Standards" Web page: www.rsasecurity.com/rsalabs/pkcs/ The National Institute of Standards and Technology "Security Requirements for Cryptographic Modules" Web page: csrc.nist.gov/cyrptval/140-1.htm  | 