Sep 2004 - Feb 2008, Doctor’s 
   Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai, China 
   Supervisors: Prof. Kefei Chen 
   Doctoral Dissertation: The Formal Study of Secure Threshold Cryptographic schemes
Sep 2002 - March 2005, Master’s 
   Department of Information Security Engineering , Shanghai Jiao Tong University, Shanghai, China 
   Supervisor: Prof. Zhenfu Cao 
   Master Thesis: Research of Threshold Key Escrow 
Sep 1998-Jul 2002, B.S. 
   Department of Computer and Communication Engineering, SouthWest Jiao Tong University, Chengdu, China

Jan 2016-, Associate Professor, Shanghai Jiao Tong Uniersity

Feb 2008- Dec 2015, Research Assitant, Shanghai Jiao Tong University

June 2012-June 2013,  Visiting Researcher, ENS, France

Sep 2008- Mar 2009, Visiting Researcher, IBM Chinese Research Center

• 2009, Hilary term, Master of Computer Technique Engineering, Cryptography and Computer Security 
• 2009, Autumn term, Master of Computer Technique Engineering, Cryptography and Computer Security
• 2009, spring term, master of Computer Technique Engineering, Cryptography and Computer Security

• 2009, autumn term, master of Computer Technique Engineering,Cryptography and Computer Security

• 2009, autumn term, master of Computer Technique Engineering,Cryptography and Computer Security

• 2011, spring term, master of Computer Science, Cryptography Algorithm and Protocol
• 2012, autumn term, master of Computer Scince, Cryptography Algorithm and Protocol
• 2013, summer term, master of Computer Scince, Cryptography algorithm and protocol
• 2013, autumn term, for undergraduates, Discrete Mathematic
• 2014, spring term, for undergraduates, 计算机安全与密码学
• 2014, spring term, for master of CS, Cryptography Algorithm and Protocol
• 2014, spring term, for master of Computer Technique Engineering, Cryptography and Computer Security
• 2014 autumn term, for undergraduates, Discrete Mathematic
• 2015, spring term, for master of CS, Cryptography Algorithm and Protocol
• 2015, spring term, for undergraduates, 计算机安全与密码学
• 2015-2017, spring term, for master of Computer Technique Engineering, 计算机安全学
• 2015-2017, autumn term, for undergraduates, Discrete Mathematic （IEEE Class, 2017)
• 2016-2018, spring term/autumn term, for undergraduates, 计算机安全与密码学
• 2016-2018, spring term, for master of CS, Cryptography Algorithm and Protocol
  

1. 高政风，郑继来，汤舒扬，龙宇，刘志强，刘振，谷大武，基于 DAG 的分布式账本共识机制研究, 软件学报
2. 蔡晓晴, 邓尧 张亮, 史久琛, 陈全, 郑文立, 刘志强, 龙宇,  王堃，李超, 过敏意，区块链原理及其核心技术，计算机学报
3. Feng Shen, Yu Long, Zhen Liu, Zhiqiang Liu, Hongyang Liu, Dawu Gu and Ning Liu，A Practical Dynamic Enhanced BFT protocol，NSS 2019，13th International Conference on Network and System Security，Sapporo （NSS 2019）, Japan | 15-18 December
4. Chen Pan, Shuyang Tang, Zhonghui Ge, Zhiqiang Liu, Yu Long, Zhen Liu and Dawu Gu，Gnocchi: Multiplexed Payment Channels for Cryptocurrencies，NSS 2019， 13th International Conference on Network and System Security，Sapporo （NSS 2019）, Japan | 15-18 December 2019
5. Shuyang Tang, Yao Deng,  Jilai Zheng, Zhiqiang Liu, Zhen Liu, Yu Long and Dawu Gu，Towards a Multi-Chain Future of Proof-of-Space，securecom 2019，15th EAI International Conference on Security and Privacy in Communication Networks (securecomm 2019)，2019年10月23日-25日
6. Hongyang Liu, Feng Shen, Zhiqiang Liu, Yu Long, Zhen Liu, Dawu Gu,  A Secure and Practical Blockchain Scheme for IoT, IEEE Trustcom 2019，18th ieee international conference on trust, security and privacy in computing and communications (trustcom 2019), 2019, Aug 05-08, rotorua, New zealand
7. Qingyi Liu, Zhen Liu, Yu Long, Zhiqiang Liu, Dawu Gu, Making Monero Hard-to-Trace and More Efficient, IEEE Trustcom 2019. 18th ieee international conference on trust, security and privacy in computing and communications (trustcom 2019), 2019, Aug 05-08, rotorua, New zealand
8. Yuncong Zhang, Yu Long, Zhen Liu, Zhiqiang Liu, Dawu Gu，“Z-Channel: Scalable and Efficient Scheme in Zerocash” ，Computers & Security ，special issue on Blockchain and Cryptocurrency ，（2019，accepted）
9. Zhiqiang Liu, Shuyang Tang, Sherman Chow, Zhen Liu, Yu Long，Fork-Free Hybrid Consensus with Flexible Proof-of-Activity,Future Generation Computer Systems ，Volume 96, July 2019, Pages 515-524，
10.   Cencen Wan, Shuyang Tang, Yuncong Zhang, Chen Pan, Zhiqiang Liu, Yu Long, Zhen Liu and Yu Yu. Goshawk: A Novel Efficient, Robust and Flexible Blockchain Protocol, 14th International Conference on Information Security and Cryptology (INSCRYPT 2018), Fuzhou, China, 14-17 Dec, 2018.
11. Long Yu(#)(*); Wang Xin; Xu Xian; Hong Xuan，Highly-descriptive chain of trust in trusted computing，清华大学学报（自然科学版）, 2018.04.04, 58(04): 387~394
12. Huige Wang, Kefei Chen, Joseph Liu, Ziyuan Hu, Yu Long, Access Control Encryption with Efficient Verifiable Sanitized Decryption, Information Sciences, V. 465, pp. 72-85, 2018
13. 潘晨，刘志强，刘振，龙宇. 区块链可扩展性研究：问题与方法，计算机研究与发展，2018.
14.   Yuncong Zhang, Yu Long, Zhen Liu, Zhiqiang Liu, Dawu Gu, Z-Channel: scalable and efficient scheme in zerocash, 23rd Australasian Conference on Information Security and Privacy (ACISP 2018), Wollongong, Australia, 11-13 July, 2018, LNCS 10946, pp. 1–19, 2018. (Best paper candidate).
15. Fenjun Chen, Zhiqiang Liu, Yu Long, Zhen Liu, Secure Scheme Against Compromised Hash in Proof-of-work Blockchain, Network and System Security (NSS 2018), Hong Kong, China, 27-29 August, 2018.
16. Xu Hao, Long Yu, Liu Zhiqian, Liu Zhen, Dynamic practical byzantine fault tolerance. IEEE Conference on Communications and Network Security (IEEE CNS 2018), Beijing, China, 30 May-1 June, 2018..
17. Liangliang Wang, Kefei Chen, Yu Long, HuigeWang, An efficient pairing-free certificateless signature scheme for resource-limited systems, Science China information Sciences (2017, Accepted). (SCI, EI)(CCF B)
18. Liangliang Wang, Kefei Chen, Yu Long and Huige Wang. Cryptanalysis of a certificateless aggregate signature scheme. Security and Communication Networks, 2016, 9(11):1353-1358.(SCI, EI)(CCF C)
19. Liangliang Wang, Junzuo Lai, Hu Xiong, Kefei Chen, Yu Long: Fuzzy certificateless signature. Security and Communication Networks 9(16): 3658-3669 (2016). (SCI, EI)(CCF C)
20. Huige Wang，Kefei Chen，Yu Long，J Ye，Liangliang Wang，A new randomized message-locked encryption in the standard model，Peer-to-Peer Networking and Applications, 2016:1-11. (SCI, EI)(CCF C)
21. Liangliang Wang, Kefei Chen, Yu Long, Xianping Mao, A new RSA-based proxy re-encryption scheme, Journal of Computational Information Systems,2015,11(2):567-575.(EI)
22. Liangliang Wang, Kefei Chen, Yu Long, Xianping Mao, A Modified Efficient Certificateless Signature Scheme without Bilinear Pairings, International Conference on Intelligent Networking & Collaborative Systems 2015. (EI)
23. Jianhong Chen, Yu Long, Kefei Chen, Attribute-based parallel key insulated signature, Cybernetics and Information Technologies, 2015, 15(3). (EI)
24. X Mao，K Chen，L Wang，Y Long, On the Security of a Lattice-Based Multi-party Concurrent Signature Scheme,2014 International Conference on Intelligent Networking and Collaborative Systems (INCOS 2014) (EI)
25. Xianping Mao,Kefei Chen, Yu Long, Liangliang Wang, Attribute base signature on Lattice, Journal of Shanghai Jiaotong University ,2014,19(4):406-411 (EI)
26. Yu Long, Kefei Chen, XianpingMao, New Constructions of Dynamic Threshold Cryptosystem, Journal of Shanghai Jiaotong University ,2014,19(4):431-435 (EI)
27. Jianhong Chen, Yu Long, Kefei Chen, Attribute-based Key Insulated Signature and Its Applications, Information Sciences, Available online 18 February 2014.
28. Yongtao Wang, Kefei Chen, Yu Long, Accountable Authority Key Policy Attribute-based Encryption, SCIENCE CHINA, Vol. 55, No. 7: 1631-1638, 2012.
29. Xuan Hong, Yu Long, A Novel Unidirectional Proxy Re-Signature Scheme and Its Application for MANETS, Journal of Computers, Vol. 7, No. 7: 1796-1800, 2012.
30. 陈剑洪, 陈克非, 龙 宇, 万中美, 于 坤, 孙成富, 陈礼青，密文策略的属性基并行密钥隔离加密，软件学报，第23卷， 第10期， 页码：2795-2804页，2012.
31. Yu Long, Xian Xu, Kefei Chen, Two Identity Based Threshold Cryptosystem with Reduced Trust in PKG, 计算机研究与发展, Vol. 49, No. 5: 932-938, 2012.
32. Jianhong Chen, Kefei Chen, Yongtao Wang, Xiangxue Li, Yu Long, Zhongmei Wan, Identity Based Key Insulated Signcryption, INFORMATICA, Vol. 23, No. 1: 27-45, 2012.
33. 徐贤，龙宇，基于TPM的强身份认证研究，计算机工程，第38卷，第4期，23-27页，2012.
34. Shengli Liu, Yu Long, Kefei Chen, Key Updating Technique in Identity-based Encryption，Information Sciences, Vol. 181: 2436–2440, 2011.
35. Jianhong Chen, Yu Long, Kefei Chen, Yongtao Wang, Identity Based Key Insulated Proxy Signature without Random Oracles, Journal of Shanghai Jiao Tong University, Vol. 16, No. 5: 557-566, 2011.
36. Weidong Qiu, Zheng Gong, Bozhong Liu, Yu Long, Kefei Chen, Restrictive partially blind signature for resource-constrained information systems, Knowledge Information Systems, Vol. 26:87–103, 2011.
37. Chen Jianhong, Long Yu, Chen Kefei, Wang Yongtao, Li Xiangxue, An Efficient Threshold Key-Insulated Signature Scheme, Journal of Shanghai Jiao Tong University, Vol. 16, No. 6: 658-662, 2011.
38. Yu Long, Kefei Chen, Efficient Chosen-Ciphertext Secure Certificateless Threshold Key Encapsulation Mechanism, Information Sciences, Vol. 80, No. 7: 1167-1181, 2010.
39. Zheng Gong, Yu Long, Xuan Hong, Kefei Chen, Practical Certificateless Aggregate Signatures from Bilinear Maps, Journal of Information Science and Engineering, Vol. 26: 2093-2106, 2010.
40. Mi Wen, Zhi Yin, Yu Long, Yong Wang, An Adaptive Key Management Framework for the Wireless Mesh and Sensor Networks, Wireless Sensor Network, Vol. 2: 689-697, 2010.
41. Long Yu, Li Xiangxue, Chen Kefei, Hong Xuan, Distributed Certificateless Key Encapsulation Mechanism Secure Against the Adaptive Adversary, Journal of Shanghai Jiao Tong University, Vol. 14, No. 1: 102-107, 2009.
42. Yu Long, Zheng Gong, Kefei Chen, Shengli Liu, Provably Secure Identity-based Threshold Key Escrow from Pairing, International Journal of Network Security, Vol. 8, No. 3: 227-234, 2009.
43. Zhong-mei WAN, Xue-jia LAI, Jian WENG, Sheng-li LIU, Yu LONG, Xuan HONG, Certificateless key-insulated signature without random oracles, Journal of Zhejiang University  (Science A), Vol. 10, No. 12: 1790-1800, 2009.
44. Hong Xuan, Chen Kefei, Long Yu, Universally Composable Proactive Threshold RSA Signature Journal of Shanghai Jiao Tong University, Vol. 13, No. 6: 659-663, 2008.
45. Wan Zhong mei, Lai Xue-jia, Weng Jian, Hong Xuan, Long Yu, Jia Wei Wei，On Constructing Certificateless Proxy Signature From Certificateless Signature，Journal of Shanghai Jiao Tong University, Vol. 13, No. 6: 692-694, 2008.
46. Yu Long, Kefei Chen, Certificateless Threshold Cryptosystem Secure Against Chosen-Ciphertext Attack, Information Sciences, Vol. 177: 5620-5637, 2007.
47. Long Yu, Chen Kefei, Gong Zheng, Efficient Chosen-Ciphertext Secure Certificateless Threshold Key Encapsulation Mechanism, Proceeding of the China Cryptography Conference 2007.
48. Yu Long, Kefei Chen, Shengli Liu, ID-Based Threshold Decryption Secure Against Adaptive Chosen-Ciphertext Attack, Computers and Electrical Engineering, Vol. 33: 166-176, 2007.
49. Z. Gong, Yu Long, K.F. Chen, Efficient Partially Blind Signature from LFSR, SNPD 2007, Vol. 2: 717-722, Qindao, China.
50. Zheng Gong, Yu Long, Xuan Hong, Kefei Chen, Two Certificateless Aggregate Signatures From Bilinear Maps. SNPD 2007, Vol. 3: 188-193, Qindao, China.
51. Yu Long, Kefei Chen, Shengli Liu, Adaptive Chosen Ciphertext Secure Threshold Key Escrow Scheme from Pairing, INFORMATICA, Vol. 17, No. 4: 519-534, 2006.
52. Yu Long, Li Shiqun, Liu Shengli, Chen Kefei, How to Construct Provably Secure ID-based Mediated Threshold Cryptosystems without Key Escrow, Proceeding of the China Cryptography Conference 2006.
53. Yu Long, Chen Kefei, Hong Xuan, A New Chosen Ciphertext Secure ID-Based Threshold Decryption Scheme from Pairing, Chinese Journal of Computers, Vol.29. No.9: 1679-1687, 2006.
54. Yu Long, Kefei Chen, Construction of Dynamic Threshold Decryption Scheme from Pairing, International Journal of Network Security, Vol. 2, No.2: 111–113, 2006.
55. Yu Long, Kefei Chen, Shengli Liu, ID-Based Threshold Decryption Secure Against Chosen Plaintext Attack, Journal of Shanghai Jiao Tong University (Science), Vol. E-11, No. 2: 127-133, 2006.
56. Yu Long, Zhenfu Cao, Kefei Chen, A Dynamic Threshold Commercial Key Escrow Scheme Based on Conic, Applied Mathematics and Computation, Vol. 171, No. 2: 972-982, 2005.
57. Ruishan Zhang, Yu Long, Kefei Chen, An Efficient Proactive Secret Sharing Scheme for Disjoint Large Scale Ad Hoc Networks, 5th Workshop on Applications and Services in Wireless Networks (ASWN2005), IEEE Press, 2005 pp.1-7.
58. 龙宇，曹珍富，对密钥托管系统中LEAF结构的研究 ，计算机工程，第31卷，第 12期，156-160页, 2005。
59. 龙宇，曹珍富，一种动态（k，n）门限方案，计算机工程，第31卷，第 12期，154-155页, 2005

AS PI

◆        Natural Science Foundation of China, On the Key Issues in the new functional encryption sheme, 2016-2019

◆        Natural Science Foundation of China, On the provably secure distributed public key encryption scheme in network environment, 2010-2012

◆        Ph.D. Programs Foundation of Ministry of Education of China, On the basic issues about distributed public key encryption scheme in real network environment, 2010-2012

◆        National Key laboratory of Information Security, On the dynamic distributed encryption scheme, 2011-2012

◆        Institute of Jiang Nan, On the paring-based discrete logarithmic issue in cryptography,  2013-2015

◆        Cryptographic Technique and Information Security, Key laboratory of Ministry of Education of China, On new secure and efficient functional encryption scheme, 2015-2017

◆        Project of Authentication, IBM corporation, 2009

◆        ChenXing Project of Shanghai Jiao Tong University, 2009

◆        Teaching Reform Project of Shanghai Jiao Tong University (graduate course） ,  2017

◆        Teaching Reform Project of Shanghai Jiao Tong University （undergraduate course）,  2015

• AS member
•         National Natural Science Foundation of China (Key Program), No. 61133014
•         National High Technology Research and Development Program of China (863 Program), No. 2006AA01Z422
•         Major State Basic Research Development Program of China (973 Program), No. 2007CB311201
•         National Natural Science Foundation of China, No. 60903020 90704004，61472114
•         Joint project with HuaWei on trusted computing, security attack and defense, and evolution of cryptographic algorithms
•         Joint project with Kuo Yue, Joint innovation center of blockchain

• 2010 SMC Program of Shanghai Jiao Tong University
• 2008 IBM Phd. Fellowship
• 2004-2005 Dong’s East Scholarship of Shanghai Jiao Tong University
• 2004 Excellent Graduate of Shanghai Jiao Tong University
• 2002 State Outstanding Graduate of South West Jiao Tong University