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We analyze the security of recently proposed image encryption scheme [1]. We show that the scheme is insecure and the methods used to evaluate its security are insufficient. By designing the Deliberately Weak Cipher, a completely vulnerable…

Cryptography and Security · Computer Science 2018-09-25 Martin Stanek

The flourishing blossom of deep learning has witnessed the rapid development of Chinese character recognition. However, it remains a great challenge that the characters for testing may have different distributions from those of the training…

Computer Vision and Pattern Recognition · Computer Science 2022-11-28 Haiyang Yu , Jingye Chen , Bin Li , Xiangyang Xue

Modern encryption algorithms form the foundation of digital security. However, the widespread use of encryption algorithms results in significant challenges for network defenders in identifying which specific algorithms are being employed.…

Cryptography and Security · Computer Science 2025-11-12 Xiwen Ren , Min Luo , Cong Peng , Debiao He

JPEG image compression algorithm is a widely used technique for image size reduction in edge and cloud computing settings. However, applying such lossy compression on images processed by deep neural networks can lead to significant accuracy…

Computer Vision and Pattern Recognition · Computer Science 2023-01-31 Arian Bakhtiarnia , Qi Zhang , Alexandros Iosifidis

In the recent world, security is a prime important issue, and encryption is one of the best alternative way to ensure security. More over, there are many image encryption schemes have been proposed, each one of them has its own strength and…

Cryptography and Security · Computer Science 2011-03-22 G. A. Sathishkumar , Dr. K. Bhoopathy bagan , Dr. N. Sriraam

In order to improve the accuracy performance of Chinese text classification models with low hardware requirements, an improved concatenation-based model is designed in this paper, which is a concatenation of 5 different sub-models,…

Computation and Language · Computer Science 2021-11-15 Qingli Man , Yuanhao Zhuo

Improving sample efficiency is a key research problem in reinforcement learning (RL), and CURL, which uses contrastive learning to extract high-level features from raw pixels of individual video frames, is an efficient…

Machine Learning · Computer Science 2020-10-16 Jinhua Zhu , Yingce Xia , Lijun Wu , Jiajun Deng , Wengang Zhou , Tao Qin , Houqiang Li

This work proposes a green learning (GL) approach to restore medical images. Without loss of generality, we use low-dose computed tomography (LDCT) images as examples. LDCT images are susceptible to noise and artifacts, where the imaging…

Computer Vision and Pattern Recognition · Computer Science 2026-02-24 Wei Wang , Yixing Wu , C. -C. Jay Kuo

A cryptarithm (or alphametic) is a mathematical puzzle in which numbers are represented with words in such a way that identical letters stand for equal digits and distinct letters for unequal digits. An alphametic puzzle is usually given in…

Number Theory · Mathematics 2025-08-29 Dmytro S. Inosov , Emil Vlasák

In this paper, we take the advantage of previous pre-trained models (PTMs) and propose a novel Chinese Pre-trained Unbalanced Transformer (CPT). Different from previous Chinese PTMs, CPT is designed to utilize the shared knowledge between…

Computation and Language · Computer Science 2022-07-19 Yunfan Shao , Zhichao Geng , Yitao Liu , Junqi Dai , Hang Yan , Fei Yang , Li Zhe , Hujun Bao , Xipeng Qiu

In this paper, a scheme for the encryption and decryption of colored images by using the Lorenz system and the discrete cosine transform in two dimensions (DCT2) is proposed. Although chaos is random, it has deterministic features that can…

Cryptography and Security · Computer Science 2017-01-12 Mohammed Alsaedi

This paper presents CERMET, an energy-efficient hardware architecture designed for hardware-constrained cryptosystems. CERMET employs a base cryptosystem in conjunction with network coding to provide both information-theoretic and…

Cryptography and Security · Computer Science 2023-08-10 Jongchan Woo , Vipindev Adat Vasudevan , Benjamin Kim , Alejandro Cohen , Rafael G. L. D'Oliveira , Thomas Stahlbuhk , Muriel Médard

This paper aims to evaluate the security of a bitstream-level JPEG encryption method using restart (RST) markers, where encrypted image can keep the JPEG file format with the same file size as non-encrypted image. Data encrypted using this…

Cryptography and Security · Computer Science 2024-10-10 Mare Hirose , Shoko Imaizumi , Hitoshi Kiya

We introduce a stop-code tolerant (SCT) approach to training recurrent convolutional neural networks for lossy image compression. Our methods introduce a multi-pass training method to combine the training goals of high-quality…

Computer Vision and Pattern Recognition · Computer Science 2017-05-19 Michele Covell , Nick Johnston , David Minnen , Sung Jin Hwang , Joel Shor , Saurabh Singh , Damien Vincent , George Toderici

Joint encryption-encoding schemes have been released to fulfill both reliability and security desires in a single step. Using Low Density Parity Check (LDPC) codes in joint encryption-encoding schemes, as an alternative to classical linear…

Information Theory · Computer Science 2019-02-22 Hossein Khayami , Taraneh Eghlidos , Mohammad Reza Aref

Random linear network code has to sacrifice part of bandwidth to transfer the coding vectors, thus a head of size k log|T| is appended to each packet. We present a distributed random network coding approach based on the Chinese remainder…

Information Theory · Computer Science 2012-08-21 Zhifang Zhang

We introduce a new CT image reconstruction algorithm that is less affected by various artifacts. The new reconstruction algorithm is a method of minimizing the difference between synchrotron X-ray tomography data and sinograms generated…

Medical Physics · Physics 2021-11-22 Byung Chun Kim , Hyunju Lee , Kyungtaek Jun

The success of deep learning in computer vision has been driven by models of increasing scale, from deep Convolutional Neural Networks (CNN) to large Vision Transformers (ViT). While effective, these architectures are parameter-intensive…

Computer Vision and Pattern Recognition · Computer Science 2026-04-02 Ange-Clément Akazan , Abdoulaye Koroko , Verlon Roel Mbingui , Choukouriyah Arinloye , Hassan Fifen , Rose Bandolo

Cryptographic systems are derived using units in group rings. Combinations of types of units in group rings give units not of any particular type. This includes cases of taking powers of units and products of such powers and adds the…

Group Theory · Mathematics 2020-04-14 Barry Hurley , Ted Hurley

In this paper, we propose a novel content-based image-retrieval scheme that allows us to use a mixture of plain images and compressible encrypted ones called "encryption-then-compression (EtC) images." In the proposed scheme, extended…

Image and Video Processing · Electrical Eng. & Systems 2022-02-02 Kenta Iida , Hitoshi Kiya
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