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This paper proposes a framework for security services for Voice over IP (VoIP) and Voice over LTE (VoLTE) in commercial networks using Software-Defined Networking (SDN) and Network Functions Virtualization (NFV). The VoIP/VoLTE services are exposed to several security threats such as Denial-of-Service (DoS) attack, network sniffing, unauthorized services access, and VoIP spam. The conventional security...
This paper presents a spoofing attack detection framework based on physical network characteristics (e.g., received signal strength indicator round trip time and link quality indicator) that cannot easily be mimicked by artificial means. Unlike most previous studies that are sensitive to changes in network conditions, we propose a spoofing attack detection method, which is highly robust to the changes...
Security protocols are notoriously difficult to get right, and most go through several iterations before their hidden security vulnerabilities, which are hard to detect, are triggered. To help protocol designers and developers efficiently find non-trivial bugs, we introduce SYMCONF, a practical conformance testing tool that generates high-coverage test input packets using a conformance test suite...
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