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Browsing by Author "Gire, Sophie"

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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 ...
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 ...
Feature based cryptanalytic technique for digital forensics analysis of visual cryptographic digital image data based on formal concept analysis

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

Lossless pixel value encrypted images still maintains the some properties of their respective original plain images. Ciphered Images that maintain the properties of their plain images of a given domain are very useful in ...
Feature based encryption technique for securing forensic biometric image data using aes and visual cryptography

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

with the current emergence of biometric image data applications on devices such as smart phones, security cameras, personal computers etc, there is a need for securing the image templates obtained from crime scenes as well ...
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 hybrid cryptographic encryption technique for securing surveillance digital images in mobile urban situation awareness systems

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

With the increase in structural complexities in modern cities, many operations, be they military, police, fire service, intelligence, rescue, or other field operations, require localization services and online situation ...
A new cryptographic encryption algorithm for securing digital images

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

This paper proposed a new algorithm for digital image encryption. The proposed algorithm encrypts an mxn size image by using the set of array pixel values. At the end, plain images will be encrypted using the algorithm and ...
A novel hybrid discrete cosine transformation and visual cryptographic technique for securing digital images

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

Security of digital images in today’s cyber is a major concern. Transmission of compressed and uncompressed multimedia data is necessary for communication between different devices. Devices of different screen features and ...
A security technique for authentication and security of medical images in health information systems

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

Medical images stored in health information systems, cloud or other systems are of key importance. Privacy and security needs to be guaranteed for such images through encryption and authentication processes. Encrypted and ...
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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