张乐友， 男，副教授，理学博士，研究生导师，研究方向：信息安全、密码学。在国内外期刊及会议发表论文近50篇，近20篇被

SCI检索，30篇被EI检索。现主持国家自然基金及省自然基金年项目两项。

下面仅列出几篇代表作：

1) Leyou Zhang, Yupu Hu. New Constructions of Hierarchical Attribute-Based Encryption for Fine-Grained Access

Control in Cloud Computing. KSII Transactions on internet and information systems,7,(5),1343-1356, 2013. (SCI)
2) Leyou Zhang, Yupu Hu and Qing Wu. Adaptively Secure Identity-based Broadcast Encryption with constant size

private keys and ciphertexts from the Subgroups。 Mathematical and computer Modelling, 2012, 55，pp. 12–18，2012.

(SCI,EI)
3) Leyou Zhang, Qing Wu and Yupu Hu. Hierarchical Identity-based Encryption with Constant size private keys。ETRI

Journal，2012, 34(1)，142-145。(SCI,EI)
4) Leyou Zhang, Yupu Hu and Qing Wu. Fully Secure Identity-based Broadcast Encryption in the Subgroups, China

Communications, Vol. 8, No. 2, 152-158, 2011(SCI).
5) Leyou Zhang, Yupu Hu and Qing Wu. New Constructions of Identity-based Broadcast Encryption without Random

Oracles. KSII Transactions on internet and information systems, Vol.5 No.2, pp. 247-476, 2011 (SCI).
6) Leyou Zhang, Yupu Hu and Qing Wu. Unbounded Hierarchical Identity-based Encryption in the Standard Model。

Information Journal, Vol. 15, NO. 1, pp.105-112, 2012. (SCI)
7) Leyou Zhang, Yupu Hu and Qing Wu. Identity-based threshold broadcast encryption in the standard model. KSII

Transactions on internet and information systems, Vol. 4, No. 3, pp.400-410, 2010 .(SCI)
8) Leyou Zhang, Yupu Hu and Qing Wu. New Construction of Short Hierarchical ID-Based Signature in the Standard

Model, Fundamenta  Informaticae, 90（1-2），191-201, 2009. (SCI,EI).
9) Leyou Zhang, Yupu Hu and Qing Wu. Efficient Dynamic Data Encryption Algorithm for Mobile Ad Hoc Network,

Przeglad Elektrotechniczny, 12(9b):42-47,2012. (SCI)

主持项目两项：
1) 标准模型下可证明安全的新型分级身份基加密研究(61100231/JJ0500117006)国家自然科学基金  2012.1-2014.12
2) 新型可证明安全公钥广播加密的设计与分析（DF010127001）陕西省自然科学基金 2012.1-2014.12