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With the emergence of convergent information devices capable of delivering multimedia content and providing a network communication independent of location, new challenges regarding the creation of secure environments for conducting business electronically have arisen. Digital television (d-TV) uses high-bandwidth connections to provide on-demand pay-per-view multimedia content and value-added services, such as electronic shopping. Mobile electronic commerce (m-Commerce) extends these new business models into a wireless world. Both technologies share similar requirements in terms of information security, as they require proper authentication, message integrity and confidentiality of business contracts and personal preferences.
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