Youwen Zhu         (朱友文)

JSPS Postdoctoral Fellow(外国人特別研究員)

Office: Institute of Mathematics for Industry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395 Japan

Phone: +81-92-802-4415

Email:  or


NEWS: I will join Nanjing University of Aeronautics and Astronautics (NUAA) after the JSPS project. For more details, please refer to my new homepage

As a JSPS postdoctoral fellow, I am working at Prof. Tsuyoshi Takagi's group, Institute of Mathematics for Industry in Kyushu University, Fukuoka, Japan. The fellowship is supported by JSPS (Japan Society of the Promotion of Science) project of Japan. Before joining Kyushu University, I got my B.A. in science communication in 2007 and PhD degree in computer science in 2012, respectively, both from University of Science and Technology of China (USTC).

I am interested in the area of applied cryptography and network security, secure outsourcing and privacy preservation in cloud computing and distributed computation etc.

Selected Publications

Journal papers

[1]     Youwen Zhu, Zhiqiu Huang, Liusheng Huang, Tsuyoshi Takagi. “On the Security of A Privacy-Preserving Product Calculation Scheme”, IEEE Transactions on Dependable and Secure Computing (IEEE TDSC), 2014, Accepted.

[2]     Youwen Zhu, Tsuyoshi Takagi. “Efficient Privacy-preserving Reputation Evaluation in Decentralized Environments”, IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences, 97(1): 409-412, 2014.

[3]     Youwen Zhu, Tsuyoshi Takagi, Rong Hu. “Security Analysis of Collusion-Resistant Nearest Neighbor Query Scheme on Encrypted Cloud Data”, IEICE Transactions on Information and Systems, 97(2): 326-330, 2014.

[4]     Youwen Zhu, Rui Xu, Tsuyoshi Takagi. “Secure k-NN Query on Encrypted Cloud Database without Key-sharing”, International Journal of Electronic Security and Digital Forensics, 5(3/4): 201-217, 2013. (Journal version of [12])

[5]     Youwen Zhu, Liusheng Huang, Tsuyoshi Takagi, Mingwu Zhang. Privacy-Preserving OLAP for Accurate Answer. Journal of Circuits, Systems, and Computers, 2012, 21(1): 1250009.

[6]     Youwen Zhu, Liusheng Huang, Wei Yang, Xing Yuan. Efficient Collusion-Resisting Secure Sum Protocol. Chinese Journal of Electronics, 2011, 20(3): 407-413.

[7]     Youwen Zhu, Liusheng Huang, Guoliang Chen, Wei Yang. Dynamic Trust Evaluation Model under Distributed Computing Environment. Chinese Journal of Computers, 2011, 34(1): 55-64. (in Chinese)

[8]     Youwen Zhu, Liusheng Huang, Wei Yang, Miaomiao Tian. Efficient collusion-resisting data aggregation protocol. Journal on Communications, 2010, 31(9a):223-227.  (in Chinese)

[9]     Youwen Zhu, Liusheng Huang, Dong Li, Wei Yang. Privacy-preserving Text Information Hiding Detecting Algorithm. Journal of Electronics & Information Technology, 2011, 33(2): 278-283. (in Chinese)

Conference papers

[10] Youwen Zhu, Tsuyoshi Takagi, Liusheng Huang. Efficient Secure Primitive for Privacy Preserving Distributed Computations. Proc. of the 7th international workshop on security (IWSEC’12), Fukuoka, Japan, LNCS 7631, 2012: 233-243.

[11] Youwen Zhu, Liusheng Huang, Wei Yang. Relation of PPAtMP and scalar product protocol and their applications. Proc. of the 15th IEEE symposium on computers and communications (ISCC’10), Riccione, Italy, 2010: 184-189.

[12] Youwen Zhu, Rui Xu, Tsuyoshi Takagi. Secure k-NN computation on encrypted cloud data without sharing key with query users. Proc. of international workshop on security in cloud computing (CloudComputing’13) in conjunction with ASIACCS, Hangzhou, China, 2013: 55-60.

Awards & Honors

ü  2012, Anhui Province Outstanding Graduates, from Education Department of Anhui Province (安徽省教育厅)

ü  2011, Academic New Awards for Ph. D students, from Ministry of Education, China (中华人民共和国教育部)

Updated: July 3rd, 2014