The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform

Werner Dietl - One of the best experts on this subject based on the ideXlab platform.

  • Communications and Multimedia Security - Watermark Security via Secret Wavelet Packet Subband Structures
    Communications and Multimedia Security. Advanced Techniques for Network and Data Protection, 2003
    Co-Authors: Werner Dietl
    Abstract:

    Wavelet packet decompositions generalize the classical pyramidal wavelet structure. We use the vast amount of possible wavelet packet decomposition structures to create a secret wavelet domain and discuss how this idea can be used to improve the security of watermarking schemes. Two methods to create random wavelet packet trees are discussed and analyzed. The security against Unauthorized Detection is investigated. Using JPEG and JPEG2000 compression we assess the normalized correlation and Peak Signal to Noise Ratio (PSNR) behavior of the watermarks. We conclude that the proposed systems show improved robustness against compression and provide around 21046 possible keys. The security against Unauthorized Detection is greatly improved.

  • Protection of wavelet-based watermarking systems using filter parametrization
    Signal Processing, 2003
    Co-Authors: Werner Dietl, Peter Meerwald
    Abstract:

    We discuss wavelet filter parametrization as a means to add security to wavelet-based watermarking schemes. It turns out that our proposed scheme is resistant to Unauthorized Detection and Unauthorized removal attacks and is equally robust as compared to the use of standard wavelet filters in case the underlying watermarking scheme is spread-spectrum based. Quantization-based watermarking techniques are not suited to be enhanced by this approach. We assess the security, quality and robustness of our approach in the light of four selected watermarking algorithms. Furthermore, we present an attack tailored to exploit a common weakness in image-adaptive watermarking and propose filter parametrization as a suitable countermeasure.

  • Security and Watermarking of Multimedia Contents - Key-dependent pyramidal wavelet domains for secure watermark embedding
    electronic imaging, 2003
    Co-Authors: Werner Dietl, Peter Meerwald
    Abstract:

    Wavelet filters can be parametrized to create an entire family of different wavelet filters. We discuss wavelet filter parametrization as a means to add security to wavelet based watermarking schemes. We analyze the influence of the number of filter parameters and use non-stationary multi-resolution decomposition where different wavelet filters are used at different levels of the decomposition. Using JPEG and JPEG2000 compression we assess the normalized correlation and Peak Signal to Noise Ratio (PSNR) behavior of the watermarks. The security against Unauthorized Detection is also investigated. We conclude that the proposed systems show good robustness against compression and depending on the resolution we choose for the parameters we get between 299 and 2185 possible keys.© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

  • Protection of wavelet-based watermarking systems using filter parametrization
    Signal Processing, 2003
    Co-Authors: Werner Dietl, Peter Meerwald, Andreas Uhl
    Abstract:

    We discuss wavelet filter parametrization as a means to add security to wavelet-based watermarking schemes. It turns out that our proposed scheme is resistant to Unauthorized Detection and Unauthorized removal attacks and is equally robust as compared to the use of standard wavelet filters in case the underlying watermarking scheme is spread-spectrum based. Quantization-based watermarking techniques are not suited to be enhanced by this approach. We assess the security, quality and robustness of our approach in the light of four selected watermarking algorithms. Furthermore, we present an attack tailored to exploit a common weakness in image-adaptive watermarking and propose filter parametrization as a suitable countermeasure. ?? 2003 Elsevier B.V. All rights reserved.

Andreas Uhl - One of the best experts on this subject based on the ideXlab platform.

  • Protection of wavelet-based watermarking systems using filter parametrization
    Signal Processing, 2003
    Co-Authors: Werner Dietl, Peter Meerwald, Andreas Uhl
    Abstract:

    We discuss wavelet filter parametrization as a means to add security to wavelet-based watermarking schemes. It turns out that our proposed scheme is resistant to Unauthorized Detection and Unauthorized removal attacks and is equally robust as compared to the use of standard wavelet filters in case the underlying watermarking scheme is spread-spectrum based. Quantization-based watermarking techniques are not suited to be enhanced by this approach. We assess the security, quality and robustness of our approach in the light of four selected watermarking algorithms. Furthermore, we present an attack tailored to exploit a common weakness in image-adaptive watermarking and propose filter parametrization as a suitable countermeasure. ?? 2003 Elsevier B.V. All rights reserved.

Peter Meerwald - One of the best experts on this subject based on the ideXlab platform.

  • Protection of wavelet-based watermarking systems using filter parametrization
    Signal Processing, 2003
    Co-Authors: Werner Dietl, Peter Meerwald
    Abstract:

    We discuss wavelet filter parametrization as a means to add security to wavelet-based watermarking schemes. It turns out that our proposed scheme is resistant to Unauthorized Detection and Unauthorized removal attacks and is equally robust as compared to the use of standard wavelet filters in case the underlying watermarking scheme is spread-spectrum based. Quantization-based watermarking techniques are not suited to be enhanced by this approach. We assess the security, quality and robustness of our approach in the light of four selected watermarking algorithms. Furthermore, we present an attack tailored to exploit a common weakness in image-adaptive watermarking and propose filter parametrization as a suitable countermeasure.

  • Security and Watermarking of Multimedia Contents - Key-dependent pyramidal wavelet domains for secure watermark embedding
    electronic imaging, 2003
    Co-Authors: Werner Dietl, Peter Meerwald
    Abstract:

    Wavelet filters can be parametrized to create an entire family of different wavelet filters. We discuss wavelet filter parametrization as a means to add security to wavelet based watermarking schemes. We analyze the influence of the number of filter parameters and use non-stationary multi-resolution decomposition where different wavelet filters are used at different levels of the decomposition. Using JPEG and JPEG2000 compression we assess the normalized correlation and Peak Signal to Noise Ratio (PSNR) behavior of the watermarks. The security against Unauthorized Detection is also investigated. We conclude that the proposed systems show good robustness against compression and depending on the resolution we choose for the parameters we get between 299 and 2185 possible keys.© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

  • Protection of wavelet-based watermarking systems using filter parametrization
    Signal Processing, 2003
    Co-Authors: Werner Dietl, Peter Meerwald, Andreas Uhl
    Abstract:

    We discuss wavelet filter parametrization as a means to add security to wavelet-based watermarking schemes. It turns out that our proposed scheme is resistant to Unauthorized Detection and Unauthorized removal attacks and is equally robust as compared to the use of standard wavelet filters in case the underlying watermarking scheme is spread-spectrum based. Quantization-based watermarking techniques are not suited to be enhanced by this approach. We assess the security, quality and robustness of our approach in the light of four selected watermarking algorithms. Furthermore, we present an attack tailored to exploit a common weakness in image-adaptive watermarking and propose filter parametrization as a suitable countermeasure. ?? 2003 Elsevier B.V. All rights reserved.

Hussein Ibrahim - One of the best experts on this subject based on the ideXlab platform.

  • A New Dynamic Smart-AC Model Methodology to Enforce Access Control Policy in IoT Layers
    2019 IEEE ACM 1st International Workshop on Software Engineering Research & Practices for the Internet of Things (SERP4IoT), 2019
    Co-Authors: Nadine Kashmar, Mehdi Adda, Mirna Atieh, Hussein Ibrahim
    Abstract:

    Internet of Things (IoT) is the conversion of everyday tangible devices or machines to smart objects. This means that these objects would be able to think, sense and feel. For example, your home devices will be able to detect and feel your absence to turn off the lights of empty rooms, close doors, lock the gates, and other tasks. Thus, would it be acceptable to find intruders who might mess up your daily life style or control your home appliances? Absolutely not! The same idea for factories, they definitely reject to detect any unacceptable access from any foreigner to their logical/physical assets or machines who might be able to locally or remotely control, for example, any machine operation. This would cause a significant loss for their reputation or investments, since any vulnerability or attack can produce, for example, fault products. So far, IoT is considered as one of the most essential areas of future technologies, especially for the industries. Hence, finding an environment full of smart devices needs a smart security methodology to prevent any illegal access. In this domain, various researches are conducted to find Access Control (AC) models to enforce security policies that prevent any Unauthorized Detection of sensitive data and enable secure access of information. For this purpose, we present a new dynamic Smart-AC model methodology to enforce security policy in IoT layers.

  • SERP4IoT@ICSE - A new dynamic smart-AC model methodology to enforce access control policy in IoT layers
    2019 IEEE ACM 1st International Workshop on Software Engineering Research & Practices for the Internet of Things (SERP4IoT), 2019
    Co-Authors: Nadine Kashmar, Mehdi Adda, Mirna Atieh, Hussein Ibrahim
    Abstract:

    Internet of Things (IoT) is the conversion of everyday tangible devices or machines to smart objects. This means that these objects would be able to think, sense and feel. For example, your home devices will be able to detect and feel your absence to turn off the lights of empty rooms, close doors, lock the gates, and other tasks. Thus, would it be acceptable to find intruders who might mess up your daily life style or control your home appliances? Absolutely not! The same idea for factories, they definitely reject to detect any unacceptable access from any foreigner to their logical/physical assets or machines who might be able to locally or remotely control, for example, any machine operation. This would cause a significant loss for their reputation or investments, since any vulnerability or attack can produce, for example, fault products. So far, IoT is considered as one of the most essential areas of future technologies, especially for the industries. Hence, finding an environment full of smart devices needs a smart security methodology to prevent any illegal access. In this domain, various researches are conducted to find Access Control (AC) models to enforce security policies that prevent any Unauthorized Detection of sensitive data and enable secure access of information. For this purpose, we present a new dynamic Smart-AC model methodology to enforce security policy in IoT layers.

S. Qamar - One of the best experts on this subject based on the ideXlab platform.

  • A SPREAD SPECTRUM BASED SCALABLE BLIND DIGITAL APPLICATIONS WATERMARKING TECHNIQUE FOR MULTI-PURPOSE MULTIMEDIA
    2020
    Co-Authors: S. Ahmad, S.m. Mirza, S. Qamar
    Abstract:

    The advent of digital media and availability of modem rechnology/conremporary techniques has not only helped the content creators bur also raised serious securiry concerns about acts ' of illicit copying and manipulations, breaching rightful ownership, due to possibility of exact replication of multimedia contents and ,their swifi distribution through open networks. Modem digital watermarking techniques provide a marvelous way to get out of this vicious circle. In this paper a novel, scaleable and improved transform domain blind .digital watermarking technique have been proposed that can be utilized for multipurpose multimedia applications. The system designed for generating highly random watermarks ensure imperceptibility and Unauthorized Detection difficult. Furthermore considerations of psycho-visual and domain specific redundo. ncies improve the data payload and prove robustness claims against various attacks, as presented.

  • A spread spectrum based scalable blind digital watermarking technique for multi-purpose multimedia applications
    E-Tech 2004, 2004
    Co-Authors: S. Ahmad, S.m. Mirza, S. Qamar
    Abstract:

    The advent of digital media and availability of modern technology/contemporary techniques has not only helped content creators but also raised serious security concerns about acts of illicit copying and manipulation, which breach rightful ownership, due to the possibility of exact replication of multimedia contents and their swift distribution through open networks. Modern digital watermarking techniques provide an answer to this problem. A novel, scaleable and improved transform domain blind digital watermarking technique is proposed that can be utilized for multi-purpose multimedia applications. The system, designed to generate highly random watermarks, ensures imperceptibility and difficult Unauthorized Detection. Furthermore, considerations of psycho-visual and domain specific redundancies improve the data payload and prove robustness claims against various attacks.