This paper presents Nemesis, a novel methodology for mitigating authentication bypass and access control vulnerabilities in existing web applications. Authentication attacks occur when a web application authenticates users unsafely, granting access to web clients that lack the appropriate credentials. Access control attacks occur when an access control check in the web application is incorrect ...

This paper presents Nemesis, a novel methodology for mitigating authentication bypass and access control vulnerabilities in existing web applications. Authentication attacks occur when a web application authenticates users unsafely, granting access to web clients that lack the appropriate credentials. Access control attacks occur when an access control check in the web application is incorrect ...

This paper presents the implementation of MPICH2 over the Nemesis communication subsystem and the evaluation of its shared-memory performance. We describe design issues as well as some of the optimization techniques we employed. We conducted a performance evaluation over shared memory using microbenchmarks. The evaluation shows that MPICH2 Nemesis has very low communication overhead, making it ...

In this short paper we describe a Wide Area Audio Synchronisation demonstration using the Quality of Service (QoS) facilities of the Nemesis operating system. The Nemesis operating system is a result of the ESPRIT funded Pegasus I research project. A stereo audio stream is split with each channel being input to one of two distinct network digitisation devices; one of the resulting streams is se...

With the emergence of multi-core-based processors, it is becoming significantly important to optimize both intra-node and inter-node communication in an MPI stack. MPICH2 group has recently introduced a new Nemesis-based MPI stack which provides highly optimized design for intra-node communication. It also provides modular design for different inter-node networks. Currently, the MPICH2/Nemesis ...