--In view of sensitive data management, an efficient cryptographic access control scheme is proposed. Based on attribute-based encryption, the proposed scheme not only inherits flexibility and fine-grained access control for users, but also realizes cryptographic management for servers. In additional, the scheme alleviates the administering burdens on the server, and handle dynamic access polic...

The rights of an Internet user acting anonymously conflicts with the rights of a Server victim identifying the malicious user. The ERPINA protocol, introduced in this paper, allows an honest user communicating anonymously with a Server through a PET, while the identity of a dishonest user is revealed. Prior research failed to distinguish objectively between an honest user and an attacker; and a...

in this paper a single server queuing production system is considered which is subject to gradual deterioration. the system is discussed under two different deteriorating conditions. a planning horizon is considered and server which is a d/m/1 queuing system is gradually deteriorates through time periods. a maintenance policy is taken into account whereby the server is restored to its initial c...

We point out the weaknesses of many popular approaches to eliminating E-Mail abuse (spam) and argue in favor of the challenge-response paradigm that, in our opinion, is the only viable way to address the problem at its present stage. We also present an E-Mail server (available under GPL) and a publicly accessible free demo service (see http://sfm.cs.ualberta.ca). Our server exemplifies desirabl...

In this paper, we propose a distributed, reliable and low-power-consumed key-renewal scheme for wireless sensor networks. The proposed scheme is divided into parts: the server part and the sensor-node part. The server will produce an appropriate key-generation function (KGF) for key renewal on sensor nodes under a power consumption constraint. It divides the function into slices and sends the s...

This paper extracts and documents patterns that identify problems and solutions concerning confidentiality in a client-server environment. These patterns are then organized as a pattern language. The idea is to include a new layer that is responsible for providing the security framework. This layer is composed by a Client Secure Socket and a Server Secure Socket. In order to obtain confidential...

When we want to implement a client-server applications we must consider the mobile devices limitations. So, in this paper we discuss what can be the more reliable way to exchange information between a server and an Android mobile application, since it is important for users to have an application that really works in a responsive way and preferably without any errors. In this discussion two dat...