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Documents authored by Adams, Benjamin


Document
Short Paper
Confidential, Decentralized Location-Based Data Services (Short Paper)

Authors: Benjamin Adams

Published in: LIPIcs, Volume 277, 12th International Conference on Geographic Information Science (GIScience 2023)


Abstract
There are many privacy risks when location data is collected and aggregated. We introduce the notion of using confidential smart contracts for building location-based decentralized applications that are privacy preserving. We describe a spatial library for smart contracts that run on Secret Network, a blockchain network that runs smart contracts in secure enclaves running in trusted execution environments. The library supports not only basic geometric operations but also cloaking and differential privacy mechanisms applied to spatial data stored in the contract.

Cite as

Benjamin Adams. Confidential, Decentralized Location-Based Data Services (Short Paper). In 12th International Conference on Geographic Information Science (GIScience 2023). Leibniz International Proceedings in Informatics (LIPIcs), Volume 277, pp. 12:1-12:6, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2023)


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@InProceedings{adams:LIPIcs.GIScience.2023.12,
  author =	{Adams, Benjamin},
  title =	{{Confidential, Decentralized Location-Based Data Services}},
  booktitle =	{12th International Conference on Geographic Information Science (GIScience 2023)},
  pages =	{12:1--12:6},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-288-4},
  ISSN =	{1868-8969},
  year =	{2023},
  volume =	{277},
  editor =	{Beecham, Roger and Long, Jed A. and Smith, Dianna and Zhao, Qunshan and Wise, Sarah},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.GIScience.2023.12},
  URN =		{urn:nbn:de:0030-drops-189078},
  doi =		{10.4230/LIPIcs.GIScience.2023.12},
  annote =	{Keywords: spatial data, privacy, smart contract, differential privacy}
}
Document
Short Paper
A Critical Look at Cryptogovernance of the Real World: Challenges for Spatial Representation and Uncertainty on the Blockchain (Short Paper)

Authors: Benjamin Adams and Martin Tomko

Published in: LIPIcs, Volume 114, 10th International Conference on Geographic Information Science (GIScience 2018)


Abstract
Innovation in distributed ledger technologies-blockchains and smart contracts-has been lauded as a game-changer for environmental governance and transparency. Here we critically consider how problems related to spatial representation and uncertainty complicate the picture, focusing on two cases. The first regards the impact of uncertainty on the transfer of spatial assets, and the second regards its impact on smart contract code that relies on software oracles that report sensor measurements of the physical world. Cryptogovernance of the environment will require substantial research on both these fronts if it is to become a reality.

Cite as

Benjamin Adams and Martin Tomko. A Critical Look at Cryptogovernance of the Real World: Challenges for Spatial Representation and Uncertainty on the Blockchain (Short Paper). In 10th International Conference on Geographic Information Science (GIScience 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 114, pp. 18:1-18:6, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2018)


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@InProceedings{adams_et_al:LIPIcs.GISCIENCE.2018.18,
  author =	{Adams, Benjamin and Tomko, Martin},
  title =	{{A Critical Look at Cryptogovernance of the Real World: Challenges for Spatial Representation and Uncertainty on the Blockchain}},
  booktitle =	{10th International Conference on Geographic Information Science (GIScience 2018)},
  pages =	{18:1--18:6},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-083-5},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{114},
  editor =	{Winter, Stephan and Griffin, Amy and Sester, Monika},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.GISCIENCE.2018.18},
  URN =		{urn:nbn:de:0030-drops-93465},
  doi =		{10.4230/LIPIcs.GISCIENCE.2018.18},
  annote =	{Keywords: spatial information, spatial uncertainty, blockchain, smart contract, environmental management}
}
Document
Juxtaposing Thematic Regions Derived from Spatial and Platial User-Generated Content

Authors: Grant McKenzie and Benjamin Adams

Published in: LIPIcs, Volume 86, 13th International Conference on Spatial Information Theory (COSIT 2017)


Abstract
Typical approaches to defining regions, districts or neighborhoods within a city often focus on place instances of a similar type that are grouped together. For example, most cities have at least one bar district defined as such by the clustering of bars within a few city blocks. In reality, it is not the presence of spatial locations labeled as bars that contribute to a bar region, but rather the popularity of the bars themselves. Following the principle that places, and by extension, place-type regions exist via the people that have given space meaning, we explore user-contributed content as a way of extracting this meaning. Kernel density estimation models of place-based social check-ins are compared to spatially tagged social posts with the goal of identifying thematic regions within the city of Los Angeles, CA. Dynamic human activity patterns, represented as temporal signatures, are included in this analysis to demonstrate how regions change over time.

Cite as

Grant McKenzie and Benjamin Adams. Juxtaposing Thematic Regions Derived from Spatial and Platial User-Generated Content. In 13th International Conference on Spatial Information Theory (COSIT 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 86, pp. 20:1-20:14, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2017)


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@InProceedings{mckenzie_et_al:LIPIcs.COSIT.2017.20,
  author =	{McKenzie, Grant and Adams, Benjamin},
  title =	{{Juxtaposing Thematic Regions Derived from Spatial and Platial User-Generated Content}},
  booktitle =	{13th International Conference on Spatial Information Theory (COSIT 2017)},
  pages =	{20:1--20:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-043-9},
  ISSN =	{1868-8969},
  year =	{2017},
  volume =	{86},
  editor =	{Clementini, Eliseo and Donnelly, Maureen and Yuan, May and Kray, Christian and Fogliaroni, Paolo and Ballatore, Andrea},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.COSIT.2017.20},
  URN =		{urn:nbn:de:0030-drops-77476},
  doi =		{10.4230/LIPIcs.COSIT.2017.20},
  annote =	{Keywords: place type, thematic region, temporal signature, topic modeling, user-generated content}
}
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