| (1) Function: Communication using Hybrid System Model |
| (2) //Phase 1: Ad hoc Congregation |
| (3) Let mobile user “ ” starts the query and represents |
| the number of users required to form |
| (4) Let be the set to count numbers of neighbors responded |
| (5) Initially,,, |
| (6) Let ’s actual location coordinates = |
| (7) |
| (8) while do |
| (9) broadcasts a CONGREGATE message to |
| neighbors |
| (10) Let users acknowledge |
| (11) |
| (12) |
| (13) |
| (14) return //congregation formed |
| (15) end |
| (16) chooses a random node as congregation executor , |
| |
| (17) CALL Secret_Split_Function; |
| (18) Let set and holds the perturbed locations |
| received after secret splitting |
| (19) CALL Centroid_Function; |
| (20) forwardsto and leaves ; |
| (21) generates pair |
| (22) //encrypted points |
| (23) //Phase 3: Computation performed at TP |
| (24) = CALL TP_Computation-I; |
| (25) //Encryption using mu’s |
| (26) CALL TP_Computation-II; |
| (27) //Phase 4: Decryption at mu |
| (28) //Decryption using mu’s |
| (29) Let be the set of distance difference received on |
| decryption |
| (30) CALL Min_dist () |
| (31) Broadcast Results to all members of |
