Wyniki wyszukiwania dla: DOCUMENT ENCRYPTION

• Hybrid Obfuscation of Encryption

  Publikacja

  • A. Al-Hakimi
  • A. Bakar

  - Rok 2023

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• For Your Eyes Only – Biometric Protection of PDF Documents

  Publikacja

  • J. Siciarek
  • M. Smiatacz
  • B. Wiszniewski

  - Rok 2013

  The paper introduces a concept of a digital document content encryption/decryption with facial biometric data coming from a legitimate user. Access to the document content is simple and straightforward, especially during collaborative work with mobile devices equipped with cameras. Various contexts of document exchange are presented with regard to the next generation pro-active digital documents proposed by authors. An important...

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• A New Quaternion Encryption Scheme for Image Transmission

  Publikacja

  • M. Dzwonkowski
  • R. Rykaczewski

  - Rok 2012

  Quaternions are hypercomplex number of rank 4. They are often applied to mechanics in three-dimensional space and considered as one of the best ways to represent rotations. In this paper a new encryption scheme, based on the rotation of data vector in three-dimensional space around another quaternion (key) is proposed. A computer-based simulation was created to analyze the potential of the proposed encryption technique.

• Quaternion Encryption Method for Image and Video Transmission

  Publikacja

  • M. Dzwonkowski
  • R. Rykaczewski

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 2013

  Quaternions are hyper-complex numbers of rank 4. They are often applied to mechanics in 3D space and are considered to be one of the best ways of representing rotations. In this paper a quaternion encryption method, based on algorithm by Nagase et al. (2004) has been proposed. According to a computer-based simulation the results of the performed research yield a high level of security, which is additionally strengthened by the...

• Document Numerique

  Czasopisma

  ISSN: 1279-5127

• Document centric knowledge processes

  Publikacja

  • M. Godlewska

  - Rok 2022

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• Digital Fingerprinting based on Quaternion Encryption for Image Transmission

  Publikacja

  • B. Czaplewski
  • M. Dzwonkowski
  • R. Rykaczewski

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 2013

  In this paper a new digital fingerprinting scheme for images is proposed. A proposed method is based on quaternion encryption with Cipher Block Chaining (CBC) mode of operation. Quaternions are hyper-complex numbers of rank 4 and thus often applied to mechanics in three-dimensional space. The encryption algorithm is designed for grey-tone images. For purpose of encryption, the algorithm uses the rotation of data vectors presented...

• Visual Data Encryption for Privacy Enhancement in Surveillance Systems

  Publikacja

  • J. Cichowski
  • A. Czyżewski
  • B. Kostek

  - Rok 2013

  In this paper a methodology for employing reversible visual encryption of data is proposed. The developed algorithms are focused on privacy enhancement in distributed surveillance architectures. First, motivation of the study performed and a short review of preexisting methods of privacy enhancement are presented. The algorithmic background, system architecture along with a solution for anonymization of sensitive regions of interest...

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• A new quaternion-based encryption method for DICOM images

  Publikacja

  • M. Dzwonkowski
  • M. Papaj
  • R. Rykaczewski

  - IEEE TRANSACTIONS ON IMAGE PROCESSING - Rok 2015

  In this paper, a new quaternion-based lossless encryption technique for digital image and communication on medicine (DICOM) images is proposed. We have scrutinized and slightly modified the concept of the DICOM network to point out the best location for the proposed encryption scheme, which significantly improves speed of DICOM images encryption in comparison with those originally embedded into DICOM advanced encryption standard...

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• Digital document life cycle development

  Publikacja

  • B. Wiszniewski
  • H. Krawczyk

  - Rok 2003

  Przedstawiono model DDLC wytwarzania interaktywnych dokumentów cyfrowych z ich pierwowzorów papierowych. Model DDLC opracowany w ramach 5 PR UE IST-2002-33441 MEMORIAL wyróżnia 6 faz i odpowiednie grupy funkcjonalności narzędzi do ich realizacji. Cykl wytwarzanie realizuje politykę całkowitej kontroli jakości, wykorzystującej specjalnie opracowaną metodę Visual GQM.