New Cloaking Region Obfuscation for Road Network-Indistinguishability and Location Privacy

Ma, Baihe; Lin, Xiaojie; Wang, Xu; Liu, Bin; He, Ying; Ni, Wei; Liu, Ren Ping

doi:10.1145/3545948.3545982

Cited by 8 publications

(1 citation statement)

References 33 publications

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“…A cloaking region obfuscation scheme is developed in Ref. [ 43 ], where vehicle identity and location are indistinguishable in the region of interest. A vehicle location trajectory is protected using caching and dummy positions [ 44 ] while communicating with the LBS server.…”

Section: Related Workmentioning

confidence: 99%

SGO: Semantic Group Obfuscation for Location-Based Services in VANETS

Ullah,

Shah

2024

Sensors

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Location privacy is an important parameter to be addressed in the case of vehicular ad hoc networks. Each vehicle frequently communicates with location-based services to find the nearest location of interest. The location messages communicated with the location server may contain sensitive information like vehicle identity, location, direction, and other headings. A Location-Based Services (LBS) server is not a trusted entity; it can interact with an adversary, compromising the location information of vehicles on the road and providing a way for an adversary to extract the future location tracks of a target vehicle. The existing works consider two or three neighboring vehicles as a virtual shadow to conceal location information. However, they did not fully utilize the semantic location information and pseudonym-changing process, which reduces the privacy protection level. Moreover, a lot of dummy location messages are generated that increase overheads in the network. To address these issues, we propose a Semantic Group Obfuscation (SGO) technique that utilizes both location semantics as well as an efficient pseudonym-changing scheme. SGO creates groups of similar status vehicles on the road and selects random position coordinates for communication with the LBS server. It hides the actual location of a target vehicle in a vicinity. The simulation results verify that the proposed scheme SGO improves the anonymization and entropy of vehicles, and it reduces the location traceability and overheads in the network in terms of computation cost and communication cost. The cost of overhead is reduced by 55% to 65% compared with existing schemes. We also formally model and specify SGO using High-Level Petri Nets (HLPNs), which show the correctness and appropriateness of the scheme.

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Section: Related Workmentioning

confidence: 99%

SGO: Semantic Group Obfuscation for Location-Based Services in VANETS

Ullah,

Shah

2024

Sensors

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Preserving location‐query privacy in location‐based services: A review

Rasheed,

Md Noor,

Abdul Ghani

et al. 2024

Security and Privacy

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Location‐based services (LBS) leverage the geographical information of a device to deliver information, entertainment, and other services tailored to the user's present location. LBS not only brings leisure to people's lives but also raises concerns about users' privacy. Consequently, location privacy protection has captured the attention of researchers owing to the increased adoption of location‐based services and the potential privacy issues faced by users. Along with location privacy, query privacy is also a crucial privacy concern that incurs possible damage to individual privacy and even to users' safety. Preserving location privacy only secures the user's current location but protection of query privacy guarantees the security of the user's future possible location. However, to the best of our knowledge, none of the relevant studies realized the significance of query privacy. This review paper provides an overview of LBS and its components, classifying the LBS based on: granularity, number of queries, initiator, and range. We investigated the threat model, vulnerabilities, and privacy attacks in LBS, reviewed the approaches used by the researchers to mitigate the location and query privacy threats, and evaluation metrics. We also analyzed the ability of current methods to implicitly/explicitly secure query privacy and the impact of recent technological progression on problem‐building and solution evolution. Finally, this paper concludes by identifying the open issues in the existing research and directions for future work.

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