Studies in the Area of Data Aggregation Reported from K N Toosi University of Technology (Lpm2da: a Lattice-based Privacy-preserving Multi-functional and Multi-dimensional Data Aggregation Scheme for Smart Grid) energycentral.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from energycentral.com Daily Mail and Mail on Sunday newspapers.