郭尚伟，副教授，硕士生导师，大数据安全与隐私保护专委会委员，数字媒体取证与安全专委会委员。先后在香港浸会大学数据库实验室（合作导师徐建良教授）和新加坡南洋理工大学网络安全实验室（合作导师刘杨教授和张天威教授）从事研究工作。研究方向包括（但不局限于）多媒体数据安全与隐私保护，预训练大模型与数据安全，联邦学习安全等。1）论文发表与学术服务方面，在ICDE、CVPR、ICLR、ICCV、MM、IJCAI、EMNLP、AsiaCCS和TPAMI、TIFS、TKDE、TC等国际高水平会议和期刊发表论文30余篇；担任MUST2023 Program Co-Chiar、KSME2022 Publicity Chair、ICICS2021 Submission Chair、Frontiers in Big Data审稿编辑和多个期刊客座编辑,NeurIPS、ACL、AAAI、ECCV、CVPR和TIFS、TKDE、TDSC等会议程序委员会委员和期刊审稿人。2）项目方面：主持包括国家重点研发项目子课题、国家自然科学基金重点项目课题、青年项目和重庆市自然科学基金面上项目等多个国家级和省部级纵向项目；主持CCF-腾讯犀牛基金等横向项目。3）获奖方面： 团队获得2022年度重庆市科技进步一等奖；联合指导学生获得第八届互联网+大学生创新创业大赛全国金奖、2021年全国大学生信息安全大赛作品赛一等奖。
目前研究团队博士和硕士研究生人数在18人以上，课题组经费充足，研究团队经常性组织学术及户外活动。在提供国际领先的科研环境的同时也为学生营造良好的生活氛围，请有意者发送CV到我邮箱。本课题组与香港浸会大学，新加坡南洋理工大学等研究机构有广泛深入的合作，可推荐优秀毕业生前往著名高校攻读博士学位。
The Illusion of Visual Security: Reconstructing Perceptually Encrypted Images
Ying Yang, Tao Xiang, Xiao Lv, Shangwei Guo, Tieyong Zeng
IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), CCF Rank B
Mercury: An Automated Remote Side-channel Attack to Nvidia Deep Learning Accelerator
Xiaobei Yan, Xiaoxuan Lou, Guowen Xu, Han Qiu, Shangwei Guo, Chip Hong Chang, Tianwei Zhang
International Conference on Field Programmable Technology (FPT), CCF Rank C
Erase and Repair: An Efficient Box-Free Removal Attack on High-Capacity Deep Hiding
Hangcheng Liu, Tao Xiang, Shangwei Guo, Han Li, Tianwei Zhang, Xiaofeng Liao
IEEE Transactions on Information Forensics and Security (TIFS), CCF Rank A
What can Discriminator do? Towards a Box-free Ownership Verification of Generative Adversarial Networks
Ziheng Huang, Boheng Li, Yan Cai, Run Wang, Shangwei Guo, Liming Fang, Jing Chen, Lina Wang
International Conference on Computer Vision (ICCV), CCF Rank A
Automatic Transformation Search Against Deep Leakage from Gradients
Wei Gao, Xu Zhang, Shangwei Guo, Tianwei Zhang, Tao Xiang, Han Qiu, Yonggang Wen, Yang Liu
IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI), CCF Rank A
Contrastive Fusion Representation: Mitigating Adversarial Attacks on VQA Models (Oral)
Jialing He, Zhen Qin, Hangcheng Liu, Shangwei Guo, Biwen Chen, Ning Wang, Tao Xiang
IEEE International Conference on Multimedia and Expo (ICME), CCF Rank B
EHNQ: Subjective and Objective Quality Evaluation of Enhanced Night-Time Images
Ying Yang, Tao Xiang, Shangwei Guo, Xiao Lv, Hantao Liu, Xiaofeng Liao
IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), CCF Rank B
Towards Query Efficient Black-Box Attacks: A Universal Dual Transferability-Based Framework
Tao Xiang, Hangcheng Liu, Shangwei Guo, Yan Gan, Wenjian He, Xiaofeng Liao
ACM Transactions on Intelligent Systems and Technology (TIST)
Extracting Robust Models with Uncertain Examples
Guanlin Li, Guowen Xu, Shangwei Guo, Han Qiu, Jiwei Li, Tianwei Zhang
International Conference on Learning Representations (ICLR), CSL@CQU Rank A
Secure Decentralized Image Classification with Multiparty Homomorphic Encryption
Guowen Xu, Guanlin Li, Shangwei Guo, Tianwei Zhang, Hongwei Li
IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), CCF Rank B
Text’s Armor: Optimized Local Adversarial Perturbation Against Scene Text Editing Attacks
Tao Xiang, Hangcheng Liu, Shangwei Guo, Hantao Liu, Tianwei Zhang
ACM International Conference on Multimedia (ACM MM), CCF Rank A
Rethinking the Vulnerability of DNN Watermarking: Are Watermarks Robust against Naturalness-aware Perturbations?
Run Wang, Haoxuan Li, Lingzhou Mu, Jixing Ren, Shangwei Guo, Li Liu, Liming Fang, Jing Chen, Lina Wang
ACM International Conference on Multimedia (ACM MM), CCF Rank A
Ownership Verification of DNN Architectures via Hardware Cache Side Channels
Xiaoxuan Lou, Shangwei Guo, Jiwei Li, Tianwei Zhang
IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), CCF Rank B
ESB-FL: Efficient and Secure Blockchain-Based Federated Learning with Fair Payment
Biwen Chen, Honghong Zeng, Tao Xiang, Shangwei Guo, Tianwei Zhang, Yang Liu
IEEE Transactions on Big Data (TBD)
BMIF: Privacy-Preserving Blockchain-Based Medical Image Fusion
Tao Xiang, Honghong Zeng, Biwen Chen, Shangwei Guo
ACM Transactions on Multimedia Computing Communications and Applications (TOMM) CCF Rank B
Triggerless Backdoor Attack for NLP Tasks with Clean Labels
Leilei Gan, Jiwei Li, Tianwei Zhang, Xiaoya Li, Yuxian Meng, Fei Wu, Yi Yang, Shangwei Guo, Chun Fan
North American Chapter of the Association for Computational Linguistics (NAACL), CSL@CQU Rank A
NASPY: Automated Extraction of Automated Machine Learning Models (Spotlight)
Xiaoxuan Lou, Shangwei Guo, Jiwei Li, Yaoxin Wu, Tianwei Zhang
International Conference on Learning Representations (ICLR), CSL@CQU Rank A+
BadPre: Task-agnostic Backdoor Attacks to Pre-trained NLP Foundation Models
Kangjie Chen, Yuxian Meng, Xiaofei Sun, Shangwei Guo, Tianwei Zhang, Jiwei Li, Chun Fan
International Conference on Learning Representations (ICLR), CSL@CQU Rank A
EGM: An Efficient Generative Model for Unrestricted Adversarial Examples
Tao Xiang, Hangcheng Liu, Shangwei Guo, Yan Gan, Xiaofeng Liao
ACM Transactions on Sensor Networks (TOSN), CCF Rank B
Efficient Top-k Matching for Publish/Subscribe Ride Hitching
Yafei Li, Hongyan Gu, Rui Chen, Jianliang Xu, Shangwei Guo, Junxiao Xue, Mingliang Xu
IEEE Transactions on Knowledge and Data Engineering (TKDE), CCF Rank A
Byzantine-resilient Decentralized Stochastic Gradient Descent
Shangwei Guo, Tianwei Zhang, Han Yu, Xiaofei Xie, Lei Ma, Tao Xiang, Yang Liu
IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), CCF Rank B
Topology-aware Differential Privacy for Decentralized Image Classification
Shangwei Guo, Tianwei Zhang, Guowen Xu, Han Yu, Tao Xiang, Yang Liu
IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), CCF Rank B
PRNet: A Progressive Recovery Network for Revealing Perceptually Encrypted Images
Tao Xiang, Ying Yang, Shangwei Guo, Hangcheng Liu, Hantao Liu
ACM International Conference on Multimedia (ACM MM), CCF Rank A
Fine-tuning Is Not Enough: A Simple yet Effective Watermark Removal Attack for DNN Models
Shangwei Guo, Tianwei Zhang, Han Qiu, Yi Zeng, Tao Xiang, Yang Liu
International Joint Conference on Artificial Intelligence (IJCAI), CCF Rank A
An Efficient Preprocessing-based Approach to Mitigate Advanced Adversarial Attacks
Han Qiu, Yi Zeng, Qinkai Zheng, Shangwei Guo, Tianwei Zhang, Hewu Li
IEEE Transactions on Computers (TC), CCF Rank A
Privacy-preserving Collaborative Learning with Automatic Transformation Search (Oral) [code]
Wei Gao, Shangwei Guo, Tianwei Zhang, Han Qiu, Yonggang Wen, Yang Liu
IEEE Conference on Computer Vision and Pattern Recognition (CVPR), CCF Rank A
DeepSweep: An Evaluation Framework for Mitigating DNN Backdoor Attacks using Data Augmentation [code]
Han Qiu, Yi Zeng, Shangwei Guo, Tianwei Zhang, Meikang Qiu, Bhavani Thuraisingham
ACM ASIA Conference on Computer and Communications Security (AsiaCCS), CSL@CQU Rank A
Stealing Deep Reinforcement Learning Models for Fun and Profit
Kangjie Chen, Shangwei Guo, Tianwei Zhang, Xiaofei Xie, Yang Liu
ACM ASIA Conference on Computer and Communications Security (AsiaCCS), CSL@CQU Rank A
Temporal Watermarks for Deep Reinforcement Learning Models
Kangjie Chen, Shangwei Guo, Tianwei Zhang, Shuxin Li, Yang Liu
International Conference on Autonomous Agents and Multiagent Systems (AAMAS), CCF Rank B
Privacy-Preserving Reverse Nearest Neighbor Query over Encrypted Spatial Data
Xiaoguo Li, Tao Xiang, Shangwei Guo, Hongwei Li, Yi Mu
IEEE Transactions on Services Computing (TSC), CCF Rank B
