Jesse Elwell

Learn More
This paper presents a simulation toolset for estimating the impact of Trusted Platform Modules (TPMs) on the performance of applications that use TPM services, especially in multi-core environments. The proposed toolset, consisting of an integrated CPU/TPM simulator and a set of micro-benchmarks that exercise the major TPM services, can be used to analyze(More)
We consider the problem of how to provide an execution environment where the application's secrets are safe even in the presence of malicious system software layers. We propose Iso-X --- a flexible, fine-grained hardware-supported framework that provides isolation for security-critical pieces of an application such that they can execute securely even in the(More)
Protecting modern computer systems and complex software stacks against the growing range of possible attacks is becoming increasingly difficult. The architecture of modern commodity systems allows attackers to subvert privileged system software often using a single exploit. Once the system is compromised, inclusive permissions used by current archi-tectures(More)
— Many important software applications are dominated by non-trivial serial components: Amdahl's Law places a hard upper bound on possible speedup that can be achieved for these applications. In this paper, we propose an integrated software/hardware approach for accelerating hard serial bottlenecks in data structure heavy algorithms. The key idea is to(More)
The inclusive permissions structure (e.g., the Intel ring model) of modern commodity CPUs provides privileged system software layers with arbitrary permissions to access and modify client processes, allowing them to manage these clients and the system resources efficiently. Unfortunately, these inclusive permissions allow a compromised high-privileged(More)
Embedded systems are designed to perform a specific set of tasks, and are frequently found in mobile, power-constrained environments. There is growing interest in the use of parallel computation as a means to increase performance while reducing power consumption. In this paper, we highlight fundamental limits to what can and cannot be improved by parallel(More)
  • 1