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Your search keyword '"Barker, Kevin"' showing total 5 results
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5 results on '"Barker, Kevin"'

1. Beyond the Bridge: Contention-Based Covert and Side Channel Attacks on Multi-GPU Interconnect

Author

Zhang, Yicheng, Nazaraliyev, Ravan, Dutta, Sankha Baran, Abu-Ghazaleh, Nael, Marquez, Andres, and Barker, Kevin

Subjects
Computer Science - Cryptography and Security
Abstract

High-speed interconnects, such as NVLink, are integral to modern multi-GPU systems, acting as a vital link between CPUs and GPUs. This study highlights the vulnerability of multi-GPU systems to covert and side channel attacks due to congestion on interconnects. An adversary can infer private information about a victim's activities by monitoring NVLink congestion without needing special permissions. Leveraging this insight, we develop a covert channel attack across two GPUs with a bandwidth of 45.5 kbps and a low error rate, and introduce a side channel attack enabling attackers to fingerprint applications through the shared NVLink interconnect., Comment: Accepted to SEED 2024

Published
2024

5. Evaluation of the utility and cost of secondary confirmatory testing for Neisseria gonorrhoeae identification from culture.

Author

Avery, Ellen G., Zeppa, Joseph J., Duncan, Donald Brody, Barker, Kevin R., Fattouh, Ramzi, Matukas, Larissa M., Rutherford, Candy, Cabrera, Ana, Sheth, Prameet M., Tran, Vanessa, Goneau, Lee, Katz, Kevin, Li, Xena X., and Kozak, Robert

Subjects
*NEISSERIA gonorrhoeae, *MATRIX-assisted laser desorption-ionization, *NEISSERIA, *TIME-of-flight mass spectrometry, *MEDICAL microbiology, *PATHOLOGICAL laboratories
Abstract

Current guideline recommends the use of two identification methods for Neisseria gonorrhoeae. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF) is now used for primary identification and may be sufficient for definitive identification of N. gonorrhoeae. The performance of three secondary tests (BactiCard, RapID NH and NET test) were compared using 45 bacterial isolates, including 37 Neisseria species. These secondary tests demonstrated diminished specificity (67% - 88%) for N. gonorrhoeae compared with MALDI-TOF. Additionally, data from six clinical microbiology laboratories was used to compare confirmatory test costs and the agreement of results with MALDI-TOF. Discrepancies were documented for 9.4% of isolates, though all isolates (n= 288) identified by MALDI-TOF as N. gonorrhoeae were confirmed by the reference laboratory. These data demonstrate that MALDI-TOF alone is sufficient for N. gonorrhoeae identification, as secondary did not add diagnostic value but do add costs to the testing process. [ABSTRACT FROM AUTHOR]

Published
2024
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