Aggregate signature scheme proposed by Boneh, Gentry, Lynn, and Shacham allows n signatures on n distinct messages from n distinct users to aggregate a single signature that convince any verifier that n users did indeed sign the n messages, respectively. The main benefit of such schemes is that they allow bandwidth and computational savings. In this paper, we question about whether the existing...

Nowadays, location-enabled mobile phones are becoming more and more widespread. Various players in the mobile business forecast that, in the future, a significant part of total wireless revenue will come from Location-Based Services (LBS). An LBS system extracts information about the user’s geographical location and provides services based on the positioning information. A successful LBS servic...

HAT DO MINICOMPUTER USERS want? In setting design objectives for HP's new 21MX Series minicomputers, we tried to make the objectives conform as closely as possible to the answers to this question, as we saw them. Minicomputer applications have broadened tre-m e n d ou s ly-nth e lesffewTcarilOnsfrn dsm puters today solving problems that only a few years ago would have required a large expensive...

Mechanization is the characteristic of the industrial era and computerization is the characteristic of the Information Era. Now we are facing on the transition from Industrial Era to Information Era. The spatial positioning character of Geo-spatial information is attracted by Information Technology (IT) industry. Map plays an important role in the phylogeny of humankind. Concomitance with the d...

Mobile cloud computing systems are getting increasingly popular because they can facilitate many new applications, such as opportunistic social computing by smartphone users who happen to be at a scene of importance (e.g., disaster rescue), while possibly uploading compute-heavy tasks to the resource-rich clouds. Federated mobile cloud computing further allows to coordinate and optimize the ser...

A collaborative retrieval, based on the concept of sharing between users, is increasingly used to facilitate the research and to satisfy the needs. In this context, we suggest to improve the performance of collaborative research, taking account of the annotations as a new source of information describing the documents. In our contribution, we suggest to apply the relevance feedback to expand th...

auditors play a critical role in any company. the managers of such departments should manage subordinates so well in order to obtain good results. for this condition to happen, at first the managers’ motivations should be recognized and be satisfied, otherwise neither managers, nor subordinates practice auditing in prefect condition. the results of this study show some high rating areas of inte...