Salvatore D'Onofrio

A web oriented and interactive buyer-seller watermarking protocol

This paper presents and discusses a web oriented, interactive anonymous buyer-seller watermarking protocol. In particular, the protocol enables buyers who are neither provided with digital certificates issued by trusted certification authorities (CAs) nor able to autonomously perform security actions to purchase digital contents distributed by web content providers (CPs) while keeping their identities unexposed during web transactions. The protocol also allows guilty buyers, i.e. who are responsible distributors of illegal replicas, to be unambiguously identified. Finally, the protocol has been designed so that CPs can exploit copyright protection services supplied by web service providers (SPs) in a security context. Thus, CPs can take advantage of complex protection services without having to implement them.

Exploiting multidomain non routable networks

Exploiting computing resources available within “departmental” organizations to run large-scale applications can be considered a difficult task since such resources are usually represented by computing nodes that belong to non-routable, private networks and are connected to the Internet through publicly addressable IP front-end nodes. This paper presents a Java middleware that can support the execution of large-scale, object-based applications over heterogeneous multidomain, non-routable networks. Furthermore, the middleware can be exploited to relieve programmers of the classic burden tied to the deployment of PVM runtime libraries and program executables among computational resources belonging to distinct administrative domains.

A model for the distribution of watermarked digital content on mobile networks

Although digital watermarking can be considered one of the key technologies to implement the copyright protection of digital contents distributed on the Internet, most of the content distribution models based on watermarking protocols proposed in literature have been purposely designed for fixed networks and cannot be easily adapted to mobile networks. On the contrary, the use of mobile devices currently enables new types of services and business models, and this makes the development of new content distribution models for mobile environments strategic in the current scenario of the Internet. This paper presents and discusses a distribution model of watermarked digital contents for such environments able to achieve a trade-off between the needs of efficiency and security.