1. Denoising and error correction in noisy AES-encrypted images using statistical measures
- Author
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Zafar Shahid, Naveed Islam, William Puech, Image & Interaction (ICAR), Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier (LIRMM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Foundation for Advancement of Science and Technology (NUCES | FAST Karachi), and National University of Science and Technology [Bulawayo]
- Subjects
Block cipher mode of operation ,Theoretical computer science ,Computer science ,Noise reduction ,Cryptography ,02 engineering and technology ,Encryption ,Computer Science::Multimedia ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,AES encryptionImage encryption ,Cryptosystem ,Block (data storage) ,Computer Science::Cryptography and Security ,business.industry ,020206 networking & telecommunications ,Noise ,Signal Processing ,Image denoising ,Bit error rate ,020201 artificial intelligence & image processing ,Computer Vision and Pattern Recognition ,Error detection and correction ,business ,Algorithm ,[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing ,Software - Abstract
Cryptography based techniques are used to secure confidential data from unauthorized access. These techniques are very good for the security and protection of the data but are very sensitive to noise. A single bit change in encrypted data can have a catastrophic impact on the decrypted data. This paper addresses the problem of removing bit errors in visual data which are encrypted using the AES algorithm in CBC mode (Cipher Block Chaining). We propose a noise removal approach based on the statistical analysis of each block during the decryption process. Three statistical measures are proposed, i.e. the global variance method (GVM), the mean local variance method (MLVM) and the sum of the squared derivative method (SSDM) for error correction. The proposed approach uses local statistics of the visual data and confusion/diffusion properties of the encryption algorithm to remove errors. Experimental results show that the proposed approach gives better results in removing noise and can be used for noise removal in visual data in the encrypted domain. HighlightsThis paper addresses the problem of removing bit errors in visual data which are encrypted using the AES algorithm in CBC mode.Three statistical measures are proposed, i.e. the global variance method (GVM), the mean local variance method (MLVM) and the sum of the squared derivative method (SSDM) for error correction.The proposed approach uses local statistics of the visual data and confusion/diffusion properties of the encryption algorithm to remove errors.Experimental results show that the proposed approach gives better results in removing noise and can be used for noise removal in visual data in the encrypted domain.
- Published
- 2016
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