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2011 - International Conference on Signal Processing, Communication, Computing and Networking technologies, ICSCCN-2011

作者： Sateesh, S.V.V. Sakthivel, R. Nirosha, K. Kittur, Harish M. VIT University Vellore TN India

ISBN: (纸本)9781612846538

Traditional fast Discrete Cosine Transforms (DCT)/ Inverse DCT (IDCT) algorithms have focused on reducing the arithmetic complexity. In this manuscript, we implemented a new architecture simultaneous for image compression and encryption technique suitable for real-time applications. Here, contrary to traditional compression algorithms, only special points of DCT outputs are calculated. For the encryption process, LFSR is used to generate random number and added to some DCT outputs. Both DCT algorithm and arithmetic operators used in algorithm are optimized in order to realize a compression with reduced operator requirements and to have a faster throughput. High Performance Multiplier (HPM) is being used for integer multiplications. Simulation results show the compression ratio around 66% and a PSNR about 24dB. The throughput of this architecture is 624 M samples/s with a clock frequency of 78 MHz. © 2011 IEEE.

关键词： Discrete cosine transforms

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A Novel Selective encryption DWT-based Algorithm for Medical images 14

A Novel Selective Encryption DWT-based Algorithm for Medical...

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14th International Conference on Computer Graphics, Imaging and Visualization (CGiV)

作者： Abdmouleh, Med Karim Khalfallah, An Bouhlel, Med Salim Univ Sfax Higher Inst Biotechnol Res Unit Sci & Technol Image & Telecommun Sfax Tunisia

ISBN: (纸本)9781538608524

The remarkable development of the medical imagery is due to the large use of telecommunications and information technologies in the medical domain. However, since the telemedicine is a medical act that must answer to stern rules, and follow the easiness that is offered by the informatics sciences to violate the confidentiality and authenticity of medical data. To resolve this problem, a lot of methods combining compression and encryption have been developed in the literature to secure the transmission and the storage of medical images. In this paper, we propose a new approach of partial encryption based on the Discrete Wavelet Transform (DWT) and compatible with the norm JPEG2000 in order to assure an optimal and a secure transmission and storage of medical images. This approach is, on one hand, faster since it permits a very important gain in the encryption-decryption processing time (only 6.25% of the DWT matrix coefficients will be encrypted), and on the other hand more efficient because it permits to get an encrypted medical image.

关键词： Telemedicine encryption compression DWT RSA JPEG2000

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Selective encryption techniques of JPEG2000 codestream for medical images transmission

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WSEAS Transactions on Circuits and Systems 2008年第7期7卷 718-727页

作者： Brahimi, Zahia Bessalah, Hamid Tarabet, A. Kholladi, M.K. Centre de Développement des Technologies Avancées BP 17 Baba Hassen Alger Algeria Université Mohamed Mentouri de Constantine

In this paper, novel selective encryption image schemes based on JPEG2000 are proposed. The first one encrypts only the code-blocks corresponding to some sensitive precincts. In order to improve the security level we introduce the permutation of codeblocks contributing in the selected precincts. The idea of combining permutation and selective encryption is used in order to minimize the amount of processed data encryption while ensuring the best possible degradation through the permutation. Many of proposals format compliant encryption schemes for JPEG2000 that have been made encrypt packet body data, but leave header packet in plaintext. The second approach, combines code-blocks data encryption to a cyclic permutation of all packets headers in the bitstream. Actually, in the JPEG2000 codestream, packet header information is specific to the visual content, and it is can be used as a fingerprint of the codestream. Symmetric encryption AES with CFB mode is used to encrypt in the two schemes. The proposed schemes don't introduce superfluous JPEG2000 markers in the protected codestream, i.e, its format is compliant to JPEG2000 codestream one. It keeps file format and compression ratio unchanged and doesn't degrade the original error robustness. The proposed scheme works with any standard ciphers and introduces negligible computational cost.

关键词： Cryptography

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3-D scattered dataset compression based on Gaussian curvature

3-D scattered dataset compression based on Gaussian curvatur...

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Conference on image compression and encryption technologies

作者： Li, ZY Li, DH Tang, SW Jing, X Peking Univ Ctr Informat Sci Beijing 100871 Peoples R China

ISBN: (纸本)0819442798

A compression method of 3D scattered dataset based on octree is proposed in this paper. The Gaussian curvature of a surface is used as the criterion to compress the dataset. The points containing more structural information of the shape of a surface will be kept, At the same time, the 3D object surface is decomposed into a set of Local Sur-face Patches (LSPs) using the octree model, and the time-consuming process of can be avoided. Practical experiments show that this method can achieve higher compression rate.

关键词： 3D scattered dataset Gaussian curvature compression octree

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image encryption based on Walsh Hadamard and fractional Fourier transform using Radial Hilbert Mask

Image encryption based on Walsh Hadamard and fractional Four...

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International Conference on Computing and Communication technologies for Smart Nation (IC3TSN)

作者： Maan, Priyanka Singh, Hukum Kumari, A. Charan NorthCap Univ CSE & IT Dept Gurugram India NorthCap Univ Dept Appl Sci Gurugram India

ISBN: (纸本)9781538606278

In this letter an approach for double image encryption practicing Double Random Phase Encoding (DRPE) technique that is based on Walsh lIadamard transform (WIIT) and fractional Fourier transform (FRT) is proposed. The encryption scheme incorporates Radial Hilbert Mask (RHM), Random Phase Mask (RPM) and fractional order as the keys. Using the 4-f system of DRPE twice in both the WHT and FRT domain, each image is encoded independently with the presented scheme. Matlab simulation tests demonstrate the increase in security level of the classical DRPE technique by the designed optical cryptosystem, and it has a superior insusceptibility to noise also. The efficiency and sensitivity of the presented scheme is tested by calculating MSE and PSNR. The histogram shows that the energy is conserved by using Walsh Hadamard transform and shows that the encrypted image is much easy to transfer due to the compression property of WHT.

关键词： Walsh Hadamard transform (WHT) Radial HAM Mask and fractional Fourier transform (FRT)

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Crypto-compression of medical images by selective encryption of DCT

Crypto-compression of medical images by selective encryption...

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13th European Signal Processing Conference, EUSIPCO 2005

作者： Puech, W. Rodrigues, J.M. Laboratoire LIRMM UMR CNRS 5506 Université Montpellier II 161 rue Ada 34392 Montpellier Cedex 05 France

ISBN: (纸本)1604238216

The traffic of digital images has grown rapidly in the Internet. Security of image becomes important for many sectors mainly for medical applications. Nowadays, the transmission of medical images is a daily routine, especially over wireless (battlefields, traffic accidents, etc). Partial encryption is an approach to reduce the computational resources for huge volumes of multimedia data in low power network. This paper presents a method of partial or selective encryption for JPEG images. It is based on encryption of some quantified DCT coefficients in low and high frequencies. We have combined compression and encryption in order to fully dissimulate the visual information of the image and to see the image in low quality resolution.

关键词： Cryptography

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Advanced data compression promises the next big leap in network performance

Advanced data compression promises the next big leap in netw...

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EUROPTO Symposium on Broadband European Networks (SYBEN 98)

作者： Holtz, K Holtz, E Kalienky, D Omni Dimens Networks San Francisco CA 94109 USA

ISBN: (纸本)0819428604

Three recently introduced technologies: a new Autosophy information theory;fast Content Addressable Memories;and Packet Switching protocols, are combined in data compression chipsets to improve network throughput with real-time lossless text and image compression. Compared with the cost of putting new cables into the ground or launching new satellites, data compression chipsets offer a much less expensive alternative for improving the bandwidth of broadband communication networks. Data compression is based on a new Autosophy information theory in which, in contrast to Shannon's theory, communication is determined only by the data content. In addition to high lossless data compression, this also provides virtually unbreakable "codebook" encryption and easier communication via packet switching networks. The Autosophy theories provide eight known classes of self-learning Omni Dimensional Networks. Only the serial network is explained here for use in compressed text and video communications. A new Content Addressable Read Only Memory (CAROM) may increase data compression speed to more than 20 Million symbols per second, fast enough for virtually any network speed.

关键词： autosophy information theory lossless data compression image compression video compression encryption packet networks secure communications Internet communications

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The IP-based storage of image information

The IP-based storage of image information

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Conference on image compression and encryption technologies

作者： Fu, XL Xie, CS Liu, ZB Huazhong Univ Sci & Technol Natl Storage Syst Lab Comp Sch Wuhan 430074 Peoples R China

ISBN: (纸本)0819442798

With the fast growth of data in multispectral image processing, the traditional storage architecture was challenged, It is currently being replaced by Storage Area Networks (SAN), which makes storage devices externalized from servers. A SAN is a separate network for storage, isolated from the messaging network and optimized for the movement of data between servers and storage devices. Nowadays, most of current SAN use Fibre Channel to move data between servers and storage devices (FC-SAN), but because of the drawbacks of the FC-SAN: poor interoperability, lack of skilled professional and management tools, high implementation cost and so on, the development and application of FC-SAN was obstructed. In this paper, we introduce an IP-based Storage Area Networks architecture, which has the good qualities of FC-SAN but overcomes the shortcoming of it. The principle is: use IP technology to move data between servers and storage devices, build a SAN with the IP-based network devices (not the FC-based network device), and through the switch, SAN is attached to the LAN(Local Area Network) through multiple access. Especially, These storage devices are acted as commercial NAS devices and PC.

关键词： multispectral image processing Storage Area Networks(SAN) IP-based SAN

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Visually Meaningful image encryption Algorithm Based on Parallel Compressive Sensing and Cellular Neural Network 4th

Visually Meaningful Image Encryption Algorithm Based on Para...

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4th International Conference on Smart Vehicular Technology, Transportation, Communication and Applications, VTCA 2021

作者： Zhang, Renxiu Jiang, Donghua Ding, Wei Wang, Ya Wu, Yanan Guang, Yerui Ding, Qun Electronic Engineering College Heilongjiang University Harbin150080 China School of Information Engineering Chang’an University Xi’an710064 China

ISBN: (纸本)9789811640384

At present, most image encryption algorithms protect the image by converting the original image into a visually meaningless noise-like image. However, the noise-like image can easily attract the attention of attackers, which increases the risk of being deciphered. Thus, a novel meaningful image encryption algorithm based on parallel compressive sensing and cellular neural network is proposed in this paper. In our scheme, the image is processed by three modules, namely, compression, encryption and hiding. Among them, the compression module is utilized to compress the plain images in parallel. After that, the encryption module converts the compressed image into a meaningless noise-like image by diffusion and scrambling. Finally, the hiding module realizes the visualization of the encrypted image by embedding the encrypted image into a carrier image, which helps reduce the interest of attacker in deciphering cipher images. Experimental results and analysis indicate that the proposed algorithm has satisfactory performance and can effectively protect image information from being leaked under the premise of reducing computational overhead. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Cryptography

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Medical image Authentication and Restoration Based on mCloud Computing: Towards Reliant Medical Digitization Era 4th

Medical Image Authentication and Restoration Based on mCloud...

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4th Doctoral Symposium on Computational Intelligence, DoSCI 2023

作者： Al-Rubbiay, Fatma Hassan Youssef, Asraa Y. Mahmood, Sawsan. D. Department of Statistics College of Economics and Administration Mustansiriyah University Baghdad Iraq College of Agriculture Department of Soil Sciences and Water Resources University of Diyala Baqubah Iraq College of Education for Pure Science Computer Science Department University of Diyala Baqubah Iraq

ISBN: (纸本)9789819937158

The protection of multimedia data, particularly images, has become crucial during the past few years. Over encryption or data-hiding technologies, image data, in particular medical image (MedImg) data, can be secured. Medical data compression is required to cut down on transmission time. Several years ago, a brand-new issue emerged combining single-step, encryption, compression, and data hiding (DtaHng). Few techniques, for example, have been put out so far to combine image compression and encryption. Today, image-based embedding of data is a new difficulty. The encryption image is of the maximum entropy, so conventional data-hiding cannot be utilized for the stage of embedding, also called noise, because the entropy is the maximum. A novel concept, Invertible Data Hiding, is utilized for MedImgs decryption containing embedded data. High-capacity reversible data-hiding techniques have recently been described, but they do not work for MedImgs protected through encryption. This study proposed analyzing the annotated encrypted MedImgs’ local standard deviations (LSD) to exclude embedded data during decryption. The utilized method was implemented in a variety of MedImgs, and the results were presented and analyzed. The suggested system also makes utilize of cloud computing technologies. Here, the client is providing the service named Data Security from the medical cloud (mCloud) server. Additionally, with a PSNR of 60 dB and above, MedImg quality is improving. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Cryptography

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