Alexander Marsalek

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The increasing market share of the Android platform is partly caused by a growing number of applications (apps) available on the Android market: by now (January 2011) roughly 200.000. This popularity in combination with the lax market approval process attracts the injection of malicious apps into the market. Android features a finegrained permission system(More)
The high usability of smartphones and tablets is embraced by consumers as well as the corporate and public sector. However, especially in the non-consumer area the factor security plays a decisive role for the platform-selection process. All of the current companies within the mobile device sector added a wide range of security features to the initially(More)
Password authentication has been made more secure by adding additional factors. Unfortunately, popular two-factor authentication methods are vulnerable to attacks themselves. Therefore, the FIDO alliance proposed Universal Second Factor (U2F), an open standard aiming for unified interfaces, secure protocols, and hardware-backed tokens for authentication.(More)
New web technologies are changing the way we interact with the web and with applications. They enable a whole new family of applications for desktop systems but also for mobile devices. The specification of HTML5 and related JavaScript APIs paved the way for rich applications backed by web technologies offering a comparable user experience to native(More)
The concepts of electronic identity (eID) and electronic signature (e-Signature) are crucial enablers of e-government solutions in Europe. The present heterogeneity of national e-government infrastructures in Europe raises serious challenges. The country-specific nature of infrastructure components prevents an easy reuse of country-specific components in(More)
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