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Web services refer to a specific set of technologies used to implement a Service Oriented Architecture. Thanks to maturing Web‐services standards, and to new mobile devices and application solutions, progress is being made in presenting similar Web‐services offerings in both mobile and fixed networks. To bring that architecture and the solutions it will support to the world of mobility is indeed a significant issue in m‐business applications, because mobile Web services present various advantages: Reduction of the overall cost of development (by reusing existing system components), faster time to market introduction of products (provided by applications’ rapid development and deployment) and remarkable possibilities to emerge new applications with increased functionalities. In addition, the new and forthcoming mobile networks, with native IP connection and high speed transmission capability, allow the development of a variety of modern multimedia services. Multimedia Messaging Services (capable to mix the media types in order to enable more intuitive messaging operation), and Instant Messaging and Presence Services (dedicated for presence, instant messaging, and distribution and sharing of multimedia content in groups of users), provide suitable underlying capabilities to support location‐based and context‐sensitive multimedia services. In this paper we will present the current approaches regarding architectural, functional and security features that allow enterprises to enjoy the benefits of traditional Web services in the mobile multimedia domain.

This paper aims to address privacy concerns that arise from the use of mobile recommender systems when processing contextual information relating to the user. Mobile recommender systems aim to solve the information overload problem by recommending products or services to users of Web services on mobile devices, such as smartphones or tablets, at any given point in time and in any possible location. They use recommendation methods, such as collaborative filtering or content-based filtering and use a considerable amount of contextual information to provide relevant recommendations. However, because of privacy concerns, users are not willing to provide the required personal information that would allow their views to be recorded and make these systems usable.

This work is focused on user privacy by providing a method for context privacy-preservation and privacy protection at user interface level. Thus, a set of algorithms that are part of the method has been designed with privacy protection in mind, which is done by using realistic dummy parameter creation. To demonstrate the applicability of the method, a relevant context-aware data set has been used to run performance and usability tests.

The proposed method has been experimentally evaluated using performance and usability evaluation tests and is shown that with a small decrease in terms of performance, user privacy can be protected.

This is a novel research paper that proposed a method for protecting the privacy of mobile recommender systems users when context parameters are used.

This study aims to identify the similarities and differences between the perspectives of providers and customers regarding the important dimensions and attributes of e‐service quality (e‐SQ).

Ten criteria are proposed for assessment of e‐SQ in both business‐to‐business (B2B) and business‐to‐consumer (B2C) transactions. Confirmatory factor analysis confirms the validity of grouping these criteria into five proposed dimensions. The e‐SQ dimensions and criteria are then ranked in terms of their importance by a survey of respondents from small and medium‐sized enterprises with experience in conducting e‐business in Greece. The results are compared with selected surveys of customers' perceptions from the literature.

The results indicate that the providers' perceptions are in agreement with customers' perceptions with regard to e‐SQ dimensions, but not with regard to specific criteria (items) within those dimensions. The study also finds that providers have similar perceptions of the importance of the suggested e‐SQ criteria in B2B and B2C electronic transactions.

The findings should be generalised with care if extrapolated to other socio‐cultural settings and specific industries.

Managers should recognise that there might be differences between their views of e‐SQ and those of their customers.

This is one of the few studies to have focused on the perceptions of providers in assessing e‐SQ.

Pervasive environments are mostly based on the ad hoc networking paradigm and are characterized by ubiquity in both users and devices and artifacts. In these inherently unstable conditions and bearing in mind the resource’s limitations that are attributed to participating devices, the deployment of Knowledge Management techniques is considered complicated due to the particular requirements. Security considerations are also very important since the distribution of knowledge information to multiple locations over a network, poses inherent problems and calls for advanced methods in order to mitigate node misbehaviour and in order to enforce authorized and authenticated access to this information. This paper addresses the issue of secure and distributed knowledge management applications in pervasive environments. We present a prototype implementation after having discussed detailed design principles as far as the communications and the application itself is regarded. Robustness and lightweight implementation are the cornerstones of the proposed solution. The approach we have undertaken makes use of overlay networks to achieve efficiency and performance optimization, exploiting ontologies. The work presented in this paper extends our initial work to tackle this problem, as this was described in (28).