A computer implemented method, apparatus, and computer program product for generating cookies. A cookie value is retrieved in response to receiving the request. An expiration for the cookie value is set based on a time period in which the request is received. A set of unique identifiers, including the...http://www.google.com/patents/US20100192198?utm_source=gb-gplus-sharePatent US20100192198 - CACHING OF PRIVATE DATA FOR A CONFIGURABLE TIME PERIOD