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Wu, X., Yang, Z., Ling, C., Xia, X..  2016.  Artificial-Noise-Aided Message Authentication Codes With Information-Theoretic Security. IEEE Transactions on Information Forensics and Security. 11:1278–1290.
In the past, two main approaches for the purpose of authentication, including information-theoretic authentication codes and complexity-theoretic message authentication codes (MACs), were almost independently developed. In this paper, we consider to construct new MACs, which are both computationally secure and information-theoretically secure. Essentially, we propose a new cryptographic primitive, namely, artificial-noise-aided MACs (ANA-MACs), where artificial noise is used to interfere with the complexity-theoretic MACs and quantization is further employed to facilitate packet-based transmission. With a channel coding formulation of key recovery in the MACs, the generation of standard authentication tags can be seen as an encoding process for the ensemble of codes, where the shared key between Alice and Bob is considered as the input and the message is used to specify a code from the ensemble of codes. Then, we show that artificial noise in ANA-MACs can be well employed to resist the key recovery attack even if the opponent has an unlimited computing power. Finally, a pragmatic approach for the analysis of ANA-MACs is provided, and we show how to balance the three performance metrics, including the completeness error, the false acceptance probability, and the conditional equivocation about the key. The analysis can be well applied to a class of ANA-MACs, where MACs with Rijndael cipher are employed.
Tian, X., Ding, R., Wu, X., Bai, G..  2020.  Hardware Implementation of a Cryptographically Secure Pseudo-Random Number Generators Based on Koblitz Elliptic Curves. 2020 IEEE 3rd International Conference on Electronics Technology (ICET). :91–94.
In this brief, a cryptographically secure pseudo-random number generator based on the NIST Koblitz elliptic curve K-163 is implemented. A 3-stage pipelined multiplier is adopted to speed up point additions. In addition, Frobenius map and point additions are performed in parallel to reduce the clock cycles required for scalar multiplication. By expanding the multiplier with a multiplexer, exponentiation and multiplication can be executed simultaneously, thus greatly reducing the clock cycles needed for inversion. Implementation results on Xilinx Virtex-4 show that the frequency of the multiplier is up to 248 MHz, therefore it takes only 2.21 us for scalar multiplication over K-163. The cryptographically secure pseudo-random number generator can produce 452 Kbit random number every second.
Yu, Y., Li, H., Fu, Y., Wu, X..  2020.  A Dynamic Updating Method for Release of Privacy Protected Data Based on Privacy Differences in Relational Data. 2020 International Conference on Computer Information and Big Data Applications (CIBDA). :23—27.

To improve dynamic updating of privacy protected data release caused by multidimensional sensitivity attribute privacy differences in relational data, we propose a dynamic updating method for privacy protection data release based on the multidimensional privacy differences. By adopting the multi-sensitive bucketization technology (MSB), this method performs quantitative classification of the multidimensional sensitive privacy difference and the recorded value, provides the basic updating operation unit, and thereby realizes dynamic updating of privacy protection data release based on the privacy difference among relational data. The experiment confirms that the method can secure the data updating efficiency while ensuring the quality of data release.

Deng, M., Wu, X., Feng, P., Zeng, W..  2020.  Sparse Support Vector Machine for Network Behavior Anomaly Detection. 2020 IEEE 8th International Conference on Information, Communication and Networks (ICICN). :199–204.
Network behavior anomaly detection (NBAD) require fast mechanisms for learning from the large scale data. However, the training velocity of general machine learning approach is largely limited by the adopted training weights of all features in the NBAD. In this paper, we notice, however, that the related weights matching of NBAD features is sparse, which is not necessary for holding all weights. Hence, in this paper, we consider an efficient support vector machine (SVM) approach for NBAD by imposing 1 -norm. Essentially, we propose to use sparse SVM (S-SVM), where sparsity in model, i.e. in weights is used to interfere with special feature selection and that can achieve feature selection and classification efficiently.
Wu, X., Chen, Y., Li, S..  2018.  Contactless Smart Card Experiments in a Cybersecurity Course. 2018 IEEE Frontiers in Education Conference (FIE). :1—4.

This Innovate Practice Work in Progress paper is about education on Cybersecurity, which is essential in training of innovative talents in the era of the Internet. Besides knowledge and skills, it is important as well to enhance the students' awareness of cybersecurity in daily life. Considering that contactless smart cards are common and widely used in various areas, one basic and two advanced contactless smart card experiments were designed innovatively and assigned to junior students in 3-people groups in an introductory cybersecurity summer course. The experimental principles, facilities, contents and arrangement are introduced successively. Classroom tests were managed before and after the experiments, and a box and whisker plot is used to describe the distributions of the scores in both tests. The experimental output and student feedback implied the learning objectives were achieved through the problem-based, active and group learning experience during the experiments.

Wu, X., Xiao, J., Shao, J..  2017.  Trust-Based Protocol for Securing Routing in Opportunistic Networks. 2017 13th IEEE Conference on Automation Science and Engineering (CASE). :434–439.

It is hard to set up an end-to-end connection between source and destination in Opportunistic Networks, due to dynamic network topology and the lack of infrastructure. Instead, the store-carry-forward mechanism is used to achieve communication. Namely, communication in Opportunistic Networks relies on the cooperation among nodes. Correspondingly, Opportunistic Networks have some issues like long delays, packet loss and so on, which lead to many challenges in Opportunistic Networks. However, malicious nodes do not follow the routing rules, or refuse to cooperate with benign nodes. Some misbehaviors like black-hole attack, gray-hole attack may arbitrarily bloat their delivery competency to intercept and drop data. Selfishness in Opportunistic Networks will also drop some data from other nodes. These misbehaviors will seriously affect network performance like the delivery success ratio. In this paper, we design a Trust-based Routing Protocol (TRP), combined with various utility algorithms, to more comprehensively evaluate the competency of a candidate node and effectively reduce negative effects by malicious nodes. In simulation, we compare TRP with other protocols, and shows that our protocol is effective for misbehaviors.

Li, T., Wu, L., Zhang, X., Wu, X., Zhou, J., Wang, X..  2017.  A novel transition effect ring oscillator based true random number generator for a security SoC. 2017 International Conference on Electron Devices and Solid-State Circuits (EDSSC). :1–2.

The transition effect ring oscillator (TERO) based true random number generator (TRNG) was proposed by Varchola and Drutarovsky in 2010. There were several stochastic models for this advanced TRNG based on ring oscillator. This paper proposed an improved TERO based TRNG and implements both on Altera Cyclone series FPGA platform and on a 0.13um CMOS ASIC process. FPGA experimental results show that this balanced TERO TRNG is in good performance as the experimental data results past the national institute of standards and technology (NIST) test in 1M bit/s. The TRNG is feasible for a security SoC.

Phan, N., Wu, X., Hu, H., Dou, D..  2017.  Adaptive Laplace Mechanism: Differential Privacy Preservation in Deep Learning. 2017 IEEE International Conference on Data Mining (ICDM). :385–394.

In this paper, we focus on developing a novel mechanism to preserve differential privacy in deep neural networks, such that: (1) The privacy budget consumption is totally independent of the number of training steps; (2) It has the ability to adaptively inject noise into features based on the contribution of each to the output; and (3) It could be applied in a variety of different deep neural networks. To achieve this, we figure out a way to perturb affine transformations of neurons, and loss functions used in deep neural networks. In addition, our mechanism intentionally adds "more noise" into features which are "less relevant" to the model output, and vice-versa. Our theoretical analysis further derives the sensitivities and error bounds of our mechanism. Rigorous experiments conducted on MNIST and CIFAR-10 datasets show that our mechanism is highly effective and outperforms existing solutions.