Abstract
In clinical research, some data or samples can be anonymized. In linkable anonymizing, linkable information, which links information for personal identification to anonymized data or samples are generated. In view of privacy protection, linkable information should be controlled properly. We developed a method to refer to encrypted likable information without decryption by using searchable encryption for secure data management. Although this method will strongly enhance the protection, it takes a long computing time to retrieval. We apply additional approach ‘index’ to our system, which employs data structure for efficient retrieval to reduce search time of encrypted linkable information.
