Rafael Fedler

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Android is currently the most popular smartphone operating system. However, users feel their private information at threat, facing a rapidly increasing number of malware for Android which significantly exceeds that of other platforms. An-tivirus software promises to effectively protect against malware on mobile devices and many products are available for(More)
The number of Android-based smartphones is growing rapidly. They are increasingly used for security-critical private and business applications, such as online banking or to access corporate networks. This makes them a very valuable target for an adversary. Up to date, significant or large-scale attacks have failed, but attacks are becoming more(More)
Sophisticated malware targeting the Android mobile operating system increasingly utilizes local root exploits. These allow for the escalation of privileges and subsequent automatic, unnoticed, and permanent infection of a target device. Poor vendor patch policy leaves customer devices vulnerable for many months. All current local root exploits are(More)
—Recent years have seen the development of a multitude of tools for the security analysis of Android applications. A major deficit of current fully automated security analyses, however, is their inability to drive execution to interesting parts, such as where code is dynamically loaded or certain data is decrypted. In fact, security-critical or downright(More)
On the Android platform, antivirus software suffers from significant deficiencies. Due to platform limitations, it cannot access or monitor an Android device's full file system, but only small fractions of it. Currently, antivirus software relies on checking almost exclusively package names and package files. It is unable to monitor dynamic behavior by(More)
For the security of communication channels in today's networks and encryption of messages therein, applications and their users rely on cryptographic protocols. These are supposed to provide confidentiality and integrity of message contents. They are relied upon by online shopping, banking , communication, scientific applications, and many others. Design(More)
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