Fabian Müller, Premier Field Engineer (PFE) in Germany, just wrote a detailed article discussing a commonly asked question: how do I determine if a smart card was used for logon ? The article is posted on the TechNet Wiki with a link to the Script...

Public key based cryptographic algorithms strength is determined based on the time taken to derive the private key using brute force methods. The algorithm is deemed to be strong enough when the time required to derive private key is prohibitive enough...

There are a number of known untrusted certificates and compromised keys that have been issued by standard trusted root certification authorities. To help customers avoid interacting with these untrusted or compromised certificates and keys, an Automatic...