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Self-supervised contrastive learning (CL) effectively learns transferable representations from unlabeled data containing images or image-text pairs but suffers vulnerability to data poisoning backdoor attacks (DPCLs). An adversary can…

Computer Vision and Pattern Recognition · Computer Science 2025-08-20 Tuo Chen , Jie Gui , Minjing Dong , Ju Jia , Lanting Fang , Jian Liu

In the light of recent analyses on privacy-concerning scene revelation from visual descriptors, we develop descriptors that conceal the input image content. In particular, we propose an adversarial learning framework for training visual…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Tony Ng , Hyo Jin Kim , Vincent Lee , Daniel DeTone , Tsun-Yi Yang , Tianwei Shen , Eddy Ilg , Vassileios Balntas , Krystian Mikolajczyk , Chris Sweeney

Recently, many studies have demonstrated deep neural network (DNN) classifiers can be fooled by the adversarial example, which is crafted via introducing some perturbations into an original sample. Accordingly, some powerful defense…

Cryptography and Security · Computer Science 2019-01-10 Bin Liang , Hongcheng Li , Miaoqiang Su , Xirong Li , Wenchang Shi , Xiaofeng Wang

We propose a novel image transformation scheme using generative adversarial networks (GANs) for privacy-preserving deep neural networks (DNNs). The proposed scheme enables us not only to apply images without visual information to DNNs, but…

Cryptography and Security · Computer Science 2020-06-03 Warit Sirichotedumrong , Hitoshi Kiya

In this paper, we propose a novel privacy-preserving machine learning scheme with encrypted images, called EtC (Encryption-then-Compression) images. Using machine learning algorithms in cloud environments has been spreading in many fields.…

Cryptography and Security · Computer Science 2019-11-04 Ayana Kawamura , Yuma Kinoshita , Hitoshi Kiya

Privacy is a crucial concern in collaborative machine vision where a part of a Deep Neural network (DNN) model runs on the edge, and the rest is executed on the cloud. In such applications, the machine vision model does not need the exact…

Image and Video Processing · Electrical Eng. & Systems 2024-09-05 Bardia Azizian , Ivan V. Bajic

We propose a privacy-preserving framework for learning visual classifiers by leveraging distributed private image data. This framework is designed to aggregate multiple classifiers updated locally using private data and to ensure that no…

Computer Vision and Pattern Recognition · Computer Science 2017-07-31 Ryo Yonetani , Vishnu Naresh Boddeti , Kris M. Kitani , Yoichi Sato

This paper proposes a visual encryption method to ensure the confidentiality of digital images. The model used is based on an autoencoder using aConvolutional Neural Network (CNN) to ensure the protection of the user data on both the sender…

Cryptography and Security · Computer Science 2025-04-02 Mahdi Madani , El-Bay Bourennane

In this paper, we propose a privacy-preserving image classification method that is based on the combined use of encrypted images and the vision transformer (ViT). The proposed method allows us not only to apply images without visual…

Computer Vision and Pattern Recognition · Computer Science 2022-05-25 Zheng Qi , AprilPyone MaungMaung , Yuma Kinoshita , Hitoshi Kiya

With the rapid advancement and increased use of deep learning models in image identification, security becomes a major concern to their deployment in safety-critical systems. Since the accuracy and robustness of deep learning models are…

Machine Learning · Computer Science 2021-12-10 Dvij Kalaria , Aritra Hazra , Partha Pratim Chakrabarti

Adversarial perturbations can be added to images to protect their content from unwanted inferences. These perturbations may, however, be ineffective against classifiers that were not {seen} during the generation of the perturbation, or…

Computer Vision and Pattern Recognition · Computer Science 2020-10-01 Ricardo Sanchez-Matilla , Chau Yi Li , Ali Shahin Shamsabadi , Riccardo Mazzon , Andrea Cavallaro

This paper presents a DNN bottleneck reinforcement scheme to alleviate the vulnerability of Deep Neural Networks (DNN) against adversarial attacks. Typical DNN classifiers encode the input image into a compressed latent representation more…

Computer Vision and Pattern Recognition · Computer Science 2020-08-13 Wenqing Liu , Miaojing Shi , Teddy Furon , Li Li

Recent work has shown that deep neural networks are highly sensitive to tiny perturbations of input images, giving rise to adversarial examples. Though this property is usually considered a weakness of learned models, we explore whether it…

Computer Vision and Pattern Recognition · Computer Science 2018-07-27 Jiren Zhu , Russell Kaplan , Justin Johnson , Li Fei-Fei

In this paper, we introduce a learning model able to conceals personal information (e.g. gender, age, ethnicity, etc.) from an image, while maintaining any additional information present in the image (e.g. smile, hair-style, brightness).…

Machine Learning · Computer Science 2019-09-23 Moshe Hanukoglu , Nissan Goldberg , Aviv Rovshitz , Amos Azaria

CNNs are poised to become integral parts of many critical systems. Despite their robustness to natural variations, image pixel values can be manipulated, via small, carefully crafted, imperceptible perturbations, to cause a model to…

Computer Vision and Pattern Recognition · Computer Science 2018-04-03 Aaditya Prakash , Nick Moran , Solomon Garber , Antonella DiLillo , James Storer

The improved semantic understanding of vision-language pretrained (VLP) models has made it increasingly difficult to protect publicly posted images from being exploited by search engines and other similar tools. In this context, this paper…

Computer Vision and Pattern Recognition · Computer Science 2025-06-25 Xuelin Shen , Jiayin Xu , Kangsheng Yin , Wenhan Yang

Privacy-preserving inference of convolutional neural networks (CNNs) using homomorphic encryption has emerged as a promising approach for enabling secure machine learning in untrusted environments. In our previous work, we introduced a…

Cryptography and Security · Computer Science 2025-12-23 John Chiang

Privacy protection has always been an ongoing topic, especially for AI. Currently, a low-cost scheme called Machine Unlearning forgets the private data remembered in the model. Specifically, given a private dataset and a trained neural…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Xin Su , Zhuoran Zheng

Privacy issues were raised in the process of training deep learning in medical, mobility, and other fields. To solve this problem, we present privacy-preserving distributed deep learning method that allow clients to learn a variety of data…

Machine Learning · Computer Science 2020-09-14 Jongwon Kim , Sungho Shin , Yeonguk Yu , Junseok Lee , Kyoobin Lee

Privacy-preserving deep neural networks (DNNs) have been proposed for protecting data privacy in the cloud server. Although several encryption schemes for visually protection have been proposed for privacy-preserving DNNs, several attacks…

Cryptography and Security · Computer Science 2022-11-11 Tatsuya Chuman , Hitoshi Kiya