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Browsing by Subject "Watermarking"

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A cryptographic and watermarking encryption technique for securing and authentication of digital images

Quist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku (University of Cape Coast, 2015)

Identity management is crucial in cyberspace where infringement of one’s privacy, copy right disputes, theft and other malicious activities are very rampant. There exists a need of ownership identification and authentication ...
A cryptographic, discrete cosine transform and frequency domain watermarking approach for securing digital images

Quist-Aphetsi, Kester; Laurent, Nana; Christine, Anca; Gire, Pascu Sophie; Eghan, Jojo M.; Quaynor, Nii Narku (University of Cape Coast, 2015)

The growth in multimedia messaging, social networks, live streaming and in other applications have increased overtime. The rise in the engagement of Unmanned Ariel vehicles for agricultural, surveillance and deliver services ...
The 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, authentication

Quist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku (University of Cape Coast, 2015)

The 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 ...
A hybrid cryptographic and digital watermarking technique for securing digital images based on a generated symmetric key

Quist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku (University of Cape Coast, 2014)

The high increase in the transmission of digital data over secured and unsecured communications channels poses a lot of security and privacy concerns to both the transmitter and the receiver. Many operations engaged today ...
A Spatial Domain Watermarking Approach for Digital Images based on Image Features built on Formal Concepts Analysis

Quist-Aphetsi, Kester; Laurent, Nana; Pascu, Anca Christine; Gire, Sophie; Eghan, Jojo M.; Quaynor, Nii Narku (University of Cape Coast, 2015)

A proof of ownership based on digital forensics evidence is the way forward in solving ownership disputes in the ever growing cyberspace that confronts us today. A strong proof beyond all reasonable doubts with the good ...

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