The Experts below are selected from a list of 43389 Experts worldwide ranked by ideXlab platform
Jun Zhang - One of the best experts on this subject based on the ideXlab platform.
-
privacy preservation in social networks with sensitive edge weights
SIAM International Conference on Data Mining, 2009Co-Authors: Lian Liu, Jie Wang, Jinze Liu, Jun ZhangAbstract:With the development of emerging social networks, such as Facebook and MySpace, security and privacy threats arising from social network analysis bring a risk of disclosure of confidential knowledge when the social network data is shared or made public. In addition to the current social network anonymity de-identification techniques, we study a situation, such as in a Business Transaction network, in which weights are attached to network edges that are considered to be confidential (e.g., Transactions). We consider perturbing the weights of some edges to preserve data privacy when the network is published, while retaining the shortest path and the approximate cost of the path between some pairs of nodes in the original network. We develop two privacypreserving strategies for this application. The first strategy is based on a Gaussian randomization multiplication, the second one is a greedy perturbation algorithm based on graph theory. In particular, the second strategy not only yields an approximate length of the shortest path while maintaining the shortest path between selected pairs of nodes, but also maximizes privacy preservation of the original weights. We present experimental results to support our mathematical analysis.
Lian Liu - One of the best experts on this subject based on the ideXlab platform.
-
privacy preservation in social networks with sensitive edge weights
SIAM International Conference on Data Mining, 2009Co-Authors: Lian Liu, Jie Wang, Jinze Liu, Jun ZhangAbstract:With the development of emerging social networks, such as Facebook and MySpace, security and privacy threats arising from social network analysis bring a risk of disclosure of confidential knowledge when the social network data is shared or made public. In addition to the current social network anonymity de-identification techniques, we study a situation, such as in a Business Transaction network, in which weights are attached to network edges that are considered to be confidential (e.g., Transactions). We consider perturbing the weights of some edges to preserve data privacy when the network is published, while retaining the shortest path and the approximate cost of the path between some pairs of nodes in the original network. We develop two privacypreserving strategies for this application. The first strategy is based on a Gaussian randomization multiplication, the second one is a greedy perturbation algorithm based on graph theory. In particular, the second strategy not only yields an approximate length of the shortest path while maintaining the shortest path between selected pairs of nodes, but also maximizes privacy preservation of the original weights. We present experimental results to support our mathematical analysis.
Sini Ruohomaa - One of the best experts on this subject based on the ideXlab platform.
-
Inter-enterprise Business Transaction Management in Open Service Ecosystems
2012 IEEE 16th International Enterprise Distributed Object Computing Conference, 2012Co-Authors: Lea Kutvonen, Alex Norta, Sini RuohomaaAbstract:One of the difficult challenges in inter-enterprise computing is aligning Business Transactions and technical management of distributed Transactions, especially in breach situations. We propose and analyse a two-level Business Transaction management framework that allows injection of Business level concerns to the control processes of inter-enterprise Transactions. The two levels are associated with a) the metamodel of the collaboration, captured in eContract governing the collaboration, and b) the Transactional interactions between collaboration member services. The two levels are bound together to form a reflective model, while Business level breaches to the eContract can disturb the normal interactions, the metalevel possesses processes for managing (rolling back, compensating, ignoring, triggering ecosystem-level consequences) the failure in manners that align with the Business incentives. This framework enables correctness, coherence and efficiency of processing in open inter-enterprise environments, i.e., service ecosystems.
A. Andrusiewicz - One of the best experts on this subject based on the ideXlab platform.
-
a virtual marketplace for advertising narrowcast over digital signage networks
Electronic Commerce Research and Applications, 2004Co-Authors: J.v. Harrison, A. AndrusiewiczAbstract:Abstract Digital signage networks are a newly emerging form of electronic advertising technology that is rapidly growing in popularity but has received little attention in research literature. In this paper we motivate the cost reduction and increased effectiveness of advertising that is displayed and managed using digital signage networks as opposed to traditional signage. As an example, we describe a method for customizing advertising messages for particular demographics in different locations using dynamically configurable multimedia. We introduce a partially automated intermediary, namely the Digital Signage Exchange, which enables the formation of a virtual marketplace for display time on the digital signage network and facilitates collaboration between buyers and sellers. We present a concise representation for a customer's order for display time on the digital signage network and an informal Business Transaction management model for the exchange. This model includes support for advance bulk purchase of blocks of display time. The model also provides information to enable a counter-offer to be made to the customer when an order cannot be completely fulfilled as requested.
-
An emerging marketplace for digital advertising based on amalgamated digital signage networks
EEE International Conference on E-Commerce 2003. CEC 2003., 2003Co-Authors: J.v. Harrison, A. AndrusiewiczAbstract:Digital signage networks are a newly emerging form of electronic advertising technology that is rapidly growing in popularity but has received little attention in e-commerce (electronic commerce) literature. We motivate the cost reduction and increased effectiveness of advertising that is displayed and managed using digital signage networks as opposed to traditional signage. We introduce a partially automated intermediary, namely the digital signage exchange that forms a virtual marketplace for the purchase and sale of display time on the digital signage network. We present a concise representation for a customer's order for display time on the digital signage network and an informal Business Transaction management model for the exchange. This model includes support for advance bulk purchase of blocks of display time. It can also make a counter-offer to the customer when an order cannot be completely fulfilled as requested.
Andrew B Whinston - One of the best experts on this subject based on the ideXlab platform.
-
the economics of freebies in exchange for consumer information on the internet an exploratory study
International Journal of Electronic Commerce, 1999Co-Authors: Aimei Chang, P K Kannan, Andrew B WhinstonAbstract:A recent phenomenon in Internet advertising is the evolution of Web-based organizations that provide free e-mail services, or promotional rebates, or even cash to "qualified" on-line consumers who are willing to interact with them and view the advertisements. In order to qualify for such free services, consumers provide information on their demographics, life-styles, and preferences for products/services. The organizations use the information to target interactive advertisements of their corporate clients to the appropriate users. Different terms have been used to describe the concept, but from a Business Transaction viewpoint, these Web-based organizations act as intermediaries in collecting information from the consumers, paying for the information using freebies, and, in turn, selling it to corporate clients. Recently, several such "cybermediaries" have been the subject of takeovers by Microsoft and other Internet "portal" organizations. This paper describes the various Business models that have been adopted by these cybermediaries, examining the economic issues of the models and the implications for consumer welfare. The continued viability of the market is explored in light of recent concerns regarding breaches in privacy of consumer information. Finally, the impact of different schemes used for pricing advertisements on the Business models adopted by the organizations is discussed.
-
goodies in exchange for consumer information on the internet the economics and issues
Hawaii International Conference on System Sciences, 1998Co-Authors: Aimei Chang, P K Kannan, Andrew B WhinstonAbstract:A recent phenomenon in Internet marketing is the evolution of "virtual" organizations that provide free e-mail services or promotional rebates or even cash to "qualified" online consumers who are willing to interact with them. In order to qualify for such "goodies" the consumers provide these organizations information on their demographics, likes and dislikes, shopping/product preferences, etc., which the organizations, in turn, either sell to advertisers or use to target interactive advertisements of their corporate clients to the desired users. Although different terms have been used to describe the concept, from a Business Transaction viewpoint, these virtual organizations act as middlemen in collecting information from consumers, paying for the information, and in turn, selling it to corporate clients. We describe the various Business models that have been adopted by such organizations, explore the economic issues of such Transactions and the implications for consumer welfare. We explore the continued viability of the market in light of recent concerns regarding breaches in privacy of consumer information. Finally, we also explore the impact of different schemes used for pricing advertisements on the Business models adopted by the organizations.
