1. A system for generating cookie signatures in a device comprising a plurality of cores, the system comprising: a device intermediary to a plurality of clients and one or more servers, the device comprising a plurality of cores; a shared memory, accessible by each of the plurality of cores, for storing and accessing a random seed; a timer to signal regeneration of cookie signatures based on the random seed, the time expiring responsive to a predetermined time period; wherein the device is configured to store a new random seed generated responsive to each expiration of the cookie timer; and wherein each core of the plurality of cores is configured to generate one or more cookie signatures based on the random seed obtained from the shared memory.