紀要論文

様々な処理を実現する検索可能暗号

jpn

24321192

https://doi.org/10.15002/00014411

法政大学大学院情報科学研究科

12

1

6

2017-03-31

Version of Record

Cloud service enables users not only to save their data to an external server but also to process the data at the server. However, the data stored at could server may be stolen and tampered with by malicious party or administrator of the server. If user encrypts data before storing his data to the server to solve this problem, the data won’t be leaked to the others. However, no operation can be performed if data are encrypted. To overcome such problem, a cryptographic protocol called SSE-1 was proposed where SSE-1 allows user to search with keyword over encrypted data. However, it is difficult to put SSE-1 to practical use since SSE-1 does not support addition and deletion operations. In this paper, we propose new protocol named ASSE (Array SSE). ASSE is a protocol for searchable encryption supporting addition and deletion operations. In ASSE, index is represented by simple bit sequence. We implement ASSE and DSSE which is the existing scheme to support addition and deletion operations. We run them on Tomcat server. Implementation result shows that search and deletion operation are faster than DSSE’s operations and additions operation is more secure than DSSE’s. The result show that the ASSE is highly practical.

Article

AA12746425