Browsing by Author Quist-Aphetsi, Kester

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Showing results 1 to 11 of 11
Issue DateTitleAuthor(s)
2015A cryptographic and watermarking encryption technique for securing and authentication of digital imagesQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2015A cryptographic, discrete cosine transform and frequency domain watermarking approach for securing digital imagesQuist-Aphetsi, Kester; Laurent, Nana; Christine, Anca; Gire, Pascu Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2015The digital image data transmission and storage in today’s cyberspace has increase with privacy and security concerns. Digital media collected from different sources such as surveillance systems, forensic databases, medical images are very sensitive hence security concerns regarding the safe transmission and authentication of such digital data across secured and unsecured communication channels needs to be addressed. This security to such images should be easily used to identify the source, detect modification and secure the content of the image as well as avoiding pixel loss during the original image recovery process. In this paper, we proposed a hybrid image cryptographic encryption and digital watermarking technique for the encryption and authentication of digital image content. The image encryption was done on the RGB channels and the spatial watermarking was successfully applied to the RGB-colour bands of the digital image and this rendered the watermark visibly subtle and difficult to detect under regular viewing. The digital watermarking technique was engaged to authenticate the image and detect modifications to the watermarked image. The watermark visibility and detection was difficult to detect and the image was successfully reconstructed without any loss of pixel value after decryption. The programming and implementation was done using MATLAB. Keywords- Cryptography, digital image, Encryption, Watermarking, pixel, authenticationQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2015Feature based cryptanalytic technique for digital forensics analysis of visual cryptographic digital image data based on formal concept analysisQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2014Feature based encryption technique for securing forensic biometric image data using aes and visual cryptographyQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, J. M.; Quaynor, Nii Narku
2014A hybrid cryptographic and digital watermarking technique for securing digital images based on a generated symmetric keyQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2015A hybrid cryptographic encryption technique for securing surveillance digital images in mobile urban situation awareness systemsQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2014A new cryptographic encryption algorithm for securing digital imagesQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2015A novel hybrid discrete cosine transformation and visual cryptographic technique for securing digital imagesQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2015A security technique for authentication and security of medical images in health information systemsQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
2015A Spatial Domain Watermarking Approach for Digital Images based on Image Features built on Formal Concepts AnalysisQuist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku
Showing results 1 to 11 of 11