The workflow satisfiability problem (WSP) asks whether there exists an assignment of authorised users to the steps in a workflow specification, subject to certain constraints on the assignment. (Such an assignment is called valid.) The problem is NP-hard even when restricted to the large class of user-independent constraints. Since the number of steps k is relatively small in practice, it is na...

Users have come to rely on browser extensions to realize features that are not implemented by browser vendors. Extensions offer users the ability to, among others, block ads, de-clutter websites, enrich pages with third-party content, and take screenshots. At the same time, because of their privileged position inside a user’s browser, extensions have access to content and functionality that is ...

Recent updates of Vulnerability reports of the Open Web Application Security Project confirm that Cross Site Scripting (XSS) is one of the most common and severe web security defects. Cross-Site Scripting occurs when an application takes data from the user and sends it back to a web browser without validation or encoding. It occurs when the web application references the user input in HTML page...

This paper presents a novel approach for searching images online using textual queries and presenting the resulting images based on both conceptual and visual similarities. Given a user-specified query, the algorithm first finds the related concepts through conceptual query expansion. Each concept, together with the original query, is then used to search for images using existing image search e...

The role of the cloud within the lifetime of everyone seems to be changing into a lot of and a lot of vitality. People who usually use the cloud SaaS Service area unit traditional folks to use of all physical elements of their body. Unfortunately, members of society WHO area unit physically disabled don\'t get access to the present medium as they don’t have the flexibility to access the Cloud S...

The need for fast and vast dissemination of research results has led a new trend such that more number of authors post their documents to personal or group Web spaces so that others can easily access and download them. Similarly, more and more researchers use online search for accessing documents of interest in Web, instead of paying a visit to libraries. Currently, to locate and download an on...

As the popularity of the World Wide Web increases, the amount of traffic results in major congestion problems for the retrieval of data over wide distances. To react to this, users and browser builders have implemented various prefetching and parallel retrieval mechanisms, which initiate retrieval of documents that may be required later. This additional traffic is even worsening the situation. ...

Text document clustering is used to group a set of documents based on the information it contains and to provide retrieval results when a user browses the internet. Experimental evidences have shown that Information Retrieval applications can benefit from document clustering and it has been used as a tool to improve the performance of retrieval of information. Information retrieval is an interd...

The workflow satisfiability problem (WSP) asks whether there exists an assignment of authorised users to the steps in a workflow specification, subject to certain constraints on the assignment. (Such an assignment is called valid.) The problem is NP-hard even when restricted to the large class of user-independent constraints. Since the number of steps k is relatively small in practice, it is na...

Smart City represents one of the most promising, prominent and challenging Internet of Things (IoT) applications [22]. In the last few years, indeed, the smart city concept has played an important role in academic and industry fields, with the development and deployment of various middleware platforms and IoT-based infrastructures. However, this expansion has followed distinct approaches creati...