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5 results for “VPS”
VPS: Excavating High-Level C++ Constructs from Low-Level Binaries to Protect Dynamic Dispatching - (Evaluation Data)
<p>Evaluation data of the published paper: "VPS: Excavating High-Level C++ Constructs from Low-Level Binaries to Protect Dynamic Dispatching". The paper was published at the Annual Computer Security Applications Conference (ACSAC) 2019.</p> <p>The paper is available at: https://www.syssec.ruhr-uni-bochum.de/research/publications/VPS/</p> <p> </p> <p>Ab­stract</p> <p>Po­ly­mor­phism and in­heri­t­an­ce make C++ sui­ta­ble for wri­ting com­plex soft­ware, but si­gni­fi­cant­ly in­crea­se the at­tack sur­face be­cau­se the im­ple­men­ta­ti­on re­li­es on vir­tu­al func­tion ta­bles (vta­bles). These vta­bles con­tain func­tion poin­ters that at­ta­ckers can po­ten­ti­al­ly hi­jack and in prac­tice, vta­ble hi­ja­cking is one of the most im­portant at­tack vec­tor for C++ bi­na­ries. In this paper, we pre­sent VTa­ble Poin­ter Se­pa­ra­ti­on (VPS), a prac­tical bi­na­ry-le­vel de­fen­se against vta­ble hi­ja­cking in C++ ap­p­li­ca­ti­ons. Un­li­ke pre­vious bi­na­ry-le­vel de­fen­ses, which rely on un­sound sta­tic ana­ly­ses to match clas­ses to vir­tu­al call­si­tes, VPS achie­ves a more ac­cu­ra­te pro­tec­tion by re­stric­ting vir­tu­al call­si­tes to va­lidly crea­ted ob­jects. More spe­ci­fi­cal­ly, VPS en­su­res that vir­tu­al call­si­tes can only use ob­jects crea­ted at valid ob­ject con­struc­tion sites, and only if those ob­jects can reach the call­si­te. Mo­re­over, VPS ex­pli­cit­ly prevents false po­si­ti­ves (fal­se­ly iden­ti­fied vir­tu­al call­si­tes) from brea­king the bi­na­ry, an issue exis­ting work does not hand­le cor­rect­ly or at all. We eva­lua­te the pro­to­ty­pe im­ple­men­ta­ti­on of VPS on a di­ver­se set of com­plex, re­al-world ap­p­li­ca­ti­ons (Mon­goDB, MySQL ser­ver, Node.js, SPEC CPU2017/CPU2006), show­ing that our ap­proach pro­tects on aver­a­ge 97.8% of all vir­tu­al call­si­tes in SPEC CPU2006 and 97.4% in SPEC CPU2017 (all C++ bench­marks), with a mo­de­ra­te per­for­mance over­head of 11% and 9% geo­me­an, re­spec­tive­ly. Fur­ther­mo­re, our eva­lua­ti­on re­veals 86 false ne­ga­ti­ves in VTV, a po­pu­lar sour­ce-ba­sed de­fen­se which is part of GCC.</p>
Acoustic positioning telemetry in a case study on the Albert Canal (Belgium): VPS and YAPS positions
<p><strong>Description</strong><br> This dataset contains data of an acoustic positioning telemetry study on the Albert canal, in a 200x150 m area directly upstream of the navigation lock complex of Kwaadmechelen, Belgium. European silver eels (<em>Anguilla anguilla</em>) and Atlantic salmon smolts (<em>Salmo salar</em>) were tagged with 69-kHz acoustic transmitters (Vemco, Halifax, NS) and detected by acoustic receivers attached at the canal walls and ship guiding structures of the navigation lock complex. The study comprises 3 deployments between 2015-11-25 and 2017-06-16. At the end of each deployment, receivers were offloaded and the detections were sent to Vemco for processing and calculation of the VPS positions. Additionally, we used the raw detection data to calculate positions by use of the YAPS algorithm.</p> <p><strong>Files</strong></p> <ul> <li><strong>metadata.csv</strong>: definitions for the fields in deployments.csv, receivers.csv, transmitters.csv, detections.csv, positions_vps.csv, positions_yaps.csv and gps_track.csv.</li> <li><strong>deployments.csv</strong>: Start and end date of the 3 deployments. At the end of each deployment, receivers were offloaded and the detections were sent to Vemco for processing and calculation of the VPS positions.</li> <li><strong>receivers.csv</strong>: Positions and specifications of the used receivers (VR2W and 1 VRT2-x). Receivers with short_id ST8 and ST8-2 have the same receiver_id because it concerns the same receiver deployed in another position (changed on 2017-04-05 08:47). The short_id denotes this position.</li> <li><strong>transmitters.csv:</strong> Specifications of the used transmitters. Position and start_date/end_date are only specified for fixed transmitters (i.e. reference-Rx and synchronisation-Sx transmitters). S8-2, S9-2 and R4 were added during the last deployment, and have therefore start dates that differ from deployment start dates. Synchronisation transmitters Sx were collocated with receivers with corresponding STx-id. S8 and S8-2 have the same transmitter_id because it concerns the same transmitter deployed in another position.</li> <li><strong>detections.csv</strong>: Raw receiver detections with millisecond time accuracy, needed to perform the YAPS positioning algorithm. The synchronised time was calculated from the original time by use of the synchronisation transmitters: JennaVergeynst. (2019, November 13). JennaVergeynst/time_synchronization: Code for time synchronisation of an acoustic positioning system (Version v1.0.0). Zenodo. http://doi.org/10.5281/zenodo.3540681.</li> <li><strong>positions_vps.csv</strong>: Positions of fish, synchronisation and reference transmitters and test tracks from the Vemco Positioning System (VPS).</li> <li><strong>positions_yaps.csv</strong>: Positions of fish, synchronisation and reference transmitters and test tracks calculated with YAPS (Yet Another Positioning System): Baktoft, H., Gjelland, K. Ø., Økland, F., & Thygesen, U. H. (2017). Positioning of aquatic animals based on time‐of‐arrival and random walk models using YAPS (Yet Another Positioning Solver). Scientific Reports, 7(1), 14294. https://github.com/baktoft/yaps. The used code to prepare the synchronised detections as input data for YAPS, can be found on JennaVergeynst. (2019, November 13). JennaVergeynst/prepare_toa_for_yaps: Code to prepare TOA-data for YAPS (Version v1.0.0). Zenodo. http://doi.org/10.5281/zenodo.3540683</li> <li><strong>gps_track.csv</strong>: GPS positions of 2 test tracks: a track on 4 August with transmitter 255 and 53429 and one on 5 August with transmitter 16200.</li> </ul>
Improvement of Peritoneal Catheter Placement in VPS With a Splitable Trocar
ClinicalTrials.gov study NCT05476874. IPD Sharing: NO. Countries: 1. Publications: 3.
Precision Surgery for Pediatric Hydrocephalus: VPS vs. ETV With ML-Guided Prediction
ClinicalTrials.gov study NCT07330206. IPD Sharing: YES. Countries: 1. Publications: 0.
Use of the VasoNova VPS System During PICC Placement in an Algorithm Confirmation Study Using Fluoroscopy
ClinicalTrials.gov study NCT01232933. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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