Abstract In a real-world collaborative data sharing scenario in cloud computing, there are multiple users who can access the resource shared by multiple data owners anytime and anywhere. The evolution of user status, roles, and privilege in the federated data sharing environment become even more and more complex to handle. Efficiently managing multiple access control policies and providing appropriate access control to different groups... In a real-world collaborative data sharing scenario in cloud computing, there are multiple users who can access the resource shared by multiple data owners anytime and anywhere. The evolution of user status, roles, and privilege in the federated data sharing environment become even more and more complex to handle. Efficiently managing multiple access control policies and providing appropriate access control to different groups of user are crucially needed in such collaborative and federated environment. This paper presents the design and implementation of our proposed access control model called Collaborative-Ciphertext Policy-Attribute Role based Encryption (C-CP-ARBE). An administrative tool called CLOUDCAT is designed and developed to facilitate a flexible, secure, and efficient management of multiple user accesses and multiple access control policies in multi-owner cloud computing environment. CLOUD-CAT is designed and developed based on the integration of Ciphertext Policy-Attribute-based Encryption (CP-ABE) and Role-based Access Control Model (RBAC) access control model. To support policy management, the tool provides secure channel for several data owners to update and administer their access control policies resided at the cloud server. Finally, we present implementation details to demonstrate advanced features and performance analysis of the prototype system. Read More Read Less

Abstract In this paper a new watermarking algorithm is proposed for videos. The developed method embeds a binary image as watermark into a colour avi video..In the proposed method, LSB and DCT both are embedded in the video frames. We compare our algorithm with 2-LSB using Peak signal-to-noise ratio (PSNR). Experimental results show that the quality of the watermarked image is higher. PSNR value... In this paper a new watermarking algorithm is proposed for videos. The developed method embeds a binary image as watermark into a colour avi video..In the proposed method, LSB and DCT both are embedded in the video frames. We compare our algorithm with 2-LSB using Peak signal-to-noise ratio (PSNR). Experimental results show that the quality of the watermarked image is higher. PSNR value is 63.74db in proposed method. This is higher compare to the other method. Read More Read Less

Abstract This paper evaluates an existing algorithm for biometric identification. In identification based on biometric images, the number of image comparisons is an important factor to estimate the total processing time in addition to the processing time of a single image comparison. Maeda et al. proposed an identification algorithm which reduces the number of image comparisons. This paper evaluates the algorithm in terms of... This paper evaluates an existing algorithm for biometric identification. In identification based on biometric images, the number of image comparisons is an important factor to estimate the total processing time in addition to the processing time of a single image comparison. Maeda et al. proposed an identification algorithm which reduces the number of image comparisons. This paper evaluates the algorithm in terms of the processing time and the accuracy with the features extracted by SIFT from palmprint images. The evaluation in this paper proves that the algorithm is applicable to the SIFTbased palmprint features. Read More Read Less