CRL and OCSP

Revocation list - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Revocation_list


Online Certificate Status Protocol - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Online_Certificate_Status_Protocol

What is OCSP (Online Certificate Status Protocol)? - Definition from WhatIs.com
http://searchsecurity.techtarget.com/definition/OCSP

PUBLIC KEY INFRASTRUCTURE CERTIFICATE REVOCATION LIST VERSUS ONLINE CERTIFICATE STATUS PROTOCOL
http://www.cisco.com/c/dam/en/us/products/collateral/ios-nx-os-software/public-key-infrastructure-pki/product_data_sheet0900aecd80313df4.pdf

How Certificate Revocation Works
http://technet.microsoft.com/en-us/library/ee619754%28v=ws.10%29.aspx