A heat dissipation device is for contacting with a heat generating electronic device to remove heat from the electronic device. Then, the subset of the pictographic character parts is used to generate the pictographic character based on the subset of the pictographic character parts. The BIOS stored in the NVM is updated from the memory. The automatic rekeying may include requesting an updated key from a server. The method comprises the steps of: transmitting a user identity IDuser to a Personal Identity Manager ; receiving a set of public parameters and a prime pseudonym Pprime corresponding to the ID user from the PIM; and selecting at least two random parameters, and generating a sub-pseudonym Ppseu with the at least two random numbers, the set of public parameters, and the prime pseudonym Pprime. An analytical program executed by the Web server retrieves the collected response data from the data store and performs market analysis on the collected response data.