AbstractsComputer Science

This thesis in the field of cryptography considers secure data storage outsourcing with keyword search capabilities. To ensure data confidentiality the data is stored in encrypted format. An efficient solution has been developed to enable conjunctive keyword search. Also, a protocol is applied to enable efficient and secure sharing of encrypted data. It is possible to efficiently enrol and revoke users for both the searching and the decryption part of the system. The newly developed search technique is implemented as well to test its practical performance.