A smart card stub and a smart card proxy can be employed to enable a redirected smart card reader to be accessed within a remote session. To isolate a redirected smart card to a remote session, the smart card stub can be configured to process a response to an application's request to enumerate smart card readers. This processing can include obtaining a session identifier for each enumerated smart card reader and removing any smart card reader from the response if the session identifier of the smart card reader does not match the session identifier of the requesting application. The smart card stub can communicate with a filter driver to obtain the session identifiers employed in this process.