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26 papers · 1 filter
When Better Features Mean Greater Risks: The Performance-Privacy Trade-Off in Contrastive Learning
Ruining Sun, Hongsheng Hu, Wei Luo +4
With the rapid advancement of deep learning technology, pre-trained encoder models have demonstrated exceptional feature extraction capabilities, playing a pivotal role in the rese…
Cryptanalyzing two image encryption algorithms based on a first-order time-delay system
Sheng Liu, Chengqing Li, Qiao Hu
Security is a key problem for the transmission, interchange and storage process of multimedia systems and applications. In 2018, M. Li et al. proposed in-depth security analysis on…
Security Improvements of Several Basic Quantum Private Query Protocols with O(log N) Communication Complexity
Fang Yu, Daowen Qiu, Xiaoming Wang +3
New quantum private database (with N elements) query protocols are presented and analyzed. Protocols preserve O(logN) communication complexity of known protocols for the same task,…
Security measurement of a medical communication scheme based on chaos and DNA coding
Lei Chen, Chengqing Li, Chao Li
To encrypt sensitive information existing in a color DICOM images, a medical privacy protection scheme (called as MPPS) based on chaos and DNA coding was proposed by using two coup…
When an attacker meets a cipher-image in 2018: A Year in Review
Chengqing Li, Yun Zhang, Eric Yong Xie
This paper aims to review the encountered technical contradictions when an attacker meets the cipher-images encrypted by the image encryption schemes (algorithms) proposed in 2018…
Cryptanalysis of a Chaotic Image Encryption Algorithm Based on Information Entropy
Chengqing Li, Dongdong Lin, Bingbing Feng +2
Recently, a chaotic image encryption algorithm based on information entropy (IEAIE) was proposed. This paper scrutinizes the security properties of the algorithm and evaluates the…