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Welcome to the Systems and Internet Infrastructure Security (SIIS) Laboratory in the department of Computer Science and Engineering (CSE) at Penn State, and member lab of the Network and Security Research Center (NSRC). The SIIS Laboratory develops advanced security technologies for critical components of the modern computing infrastructure. Our researchers consider security problems at all levels of systems design, from theoretical cryptography to physical hardware. Our research has been published in top academic venues in security, networking, operating systems, software engineering, and cryptography, as well as featured in many outlets in popular press.