Securing Web servers against insider attack

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Abstract
Too often, "security of Web transactions" reduces to "encryption of the channel" - and neglects to address what happens at the server on the other end. This oversight forces clients to trust the good intentions and competence of the server operator - but gives clients no basis for that trust. In this paper, we apply secure coprocessing and cryptography to solve this real problem in Web technology. We present a vision: using secure coprocessors to establish trusted coservers at Web servers and moving sensitive computations inside these co-servers; we present a prototype implementation of this vision that scales to realistic workloads; and we validate this approach by building a simple E-voting application on top of our prototype. By showing the real potential of COTS secure coprocessing technology to establish trusted islands of computation in hostile environments - such as at Web servers with risk of insider attack - this work also helps demonstrate that "secure hardware" can be more than a synonym for "cryptographic accelerator".

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