| / Variables Initialization / |
| (1) Initialize Secret Keys and |
| (2) Predefine the edit distance “edit” value for Wildcard based Fuzzy Mulikeyword Set Creation |
| (3) Predefine Multiple Keywords for a single file and a keyword can be shared by multiple files. |
| / KeyGeneration / |
| (4) DataOwner Creates User Public key and User Private Key pairs |
| (5) Call CreateKeyPairsForUser , |
| // User Public key and User Private Key |
| (6) Receive , |
| (7) Encrypt the Kdata files using User’s Public key as |
| (8) Call EncryptMultiKeywordDataFile |
| (9) Receive the Encrypted file |
| (10) Send the Encrypted file to the Cloud storage server |
| (11) Send the User’s Private Key as Private Secret Key to the data users |
| (12) Data owner creates Wildcard basedFuzzy Multikeyword set for |
| (13) Call CreateWildCardFuzzyMultiKeywordSet(MKW ,edit) |
| (14) Receive FM |
| (15) Data ownerCreates B Ttree Wildcard searchable index for FMKS |
| (16) call CreateBTreeWildcardFuzzySearchableIndex FMKS |
| (17) Receive B Ttree Wildcard searchable index |
| (18) Encrypts the B+ tree wildcard searchable index |
| (19) call EncryptBTreeWildcardFuzzySearchableIndex |
| (20) Receive Encrypted BTree wildcard searchable index |
| (21) Send the Encrypted BTree wildcard searchable index to the cloud storage server |
| (22) Cloud Storage server shares the BTree wildcard searchable index to the Classifier Search Server |
| (23) Data User request Multikeyword search request MSR, and is encrypted using Private Secret Key to |
| create MultiKeyword Trapdoor |
| (24) MultiKeyword Trapdoor is sent to the cloud storage server |
| (25) Cloud Storage server send the to the Classifier Search Server |
| (26) Classifier Search Server searches BTree wildcard searchable index |
| (27) If the Keyword is the new keyword then |
| (28) call SearchBTreeWildCardFuzzySearchableIndex |
| (29) Keyword Classifier learn and Store the Search path pattern of |
| (30) Receive the Search path pattern of that keyword |
| (31) Send the Search path pattern of that keyword to the cloud storage server |
| (32) else if is already present in the Keyword Classifier then |
| (33) Classifier Search Server send the stored Search path pattern of to cloud storage server |
| (34) End if |
| (35) Cloud Storage Server receives the Search path pattern of |
| (36) Cloud Storage Server extracts the encrypted multiple files of |
| (37) Call ExtractMultipleFileUsingPattern SPP |
| (38) Receive the set of Matching Encrypted files |
| (39) is sent to theData user |
| (40) Data User receives the and decrypt the file using Private Secret Key PSK |
| (41) call ViewDecryptedMultiKeywordFile , |
| (42) Receive the Superset of matching Decrypted file Decrypted File MFILE |
| (43) Now the user can view the file needed and large number of files viewed by the user |
| represents the effective data utilization. |
