Abstract: Certificateless aggregate signature reduces the trust in key generation center and eases the inconvenience of certificate management at a low cost of communication and computation. Because ...

Abstract: The early grouping technique is a method for optimizing aggregate queries. It provides more opportunities for the query optimizers to find optimal plans because all possible placements of ...

Giant pandas from China have delighted visitors to zoos in Japan for more than 50 years, but fans are now anxious that the star attractions may disappear altogether amid an intensifying diplomatic row ...