Increasing Trust in Tor Node List Using Blockchain
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26230%2F19%3APU135762" target="_blank" >RIV/00216305:26230/19:PU135762 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1109/BLOC.2019.8751340" target="_blank" >http://dx.doi.org/10.1109/BLOC.2019.8751340</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/BLOC.2019.8751340" target="_blank" >10.1109/BLOC.2019.8751340</a>
Alternative languages
Result language
angličtina
Original language name
Increasing Trust in Tor Node List Using Blockchain
Original language description
Tor is a low-latency free anonymization network based on onion routing. In Tor, directory servers maintain a list of all nodes. It is, however, possible for a powerful adversary (e.g., law enforcement agencies) to seize or compromise enough directory servers and thus forge that list. Therefore, clients that obtained such a forged list of nodes can be effectively deanonymized. As a countermeasure, we propose to utilize a permissioned blockchain with a single voting committee that is privately 'elected' by a verifiable random function (VRF). Since the blockchain provides us with integrity guarantees by design, we increase trust in the directory servers by decentralizing management of Tor nodes present in the shared list. We apply skiplist as an optimization reducing a validation overhead of newly joined nodes and clients. The proposed approach has only a small performance impact on the existing Tor infrastructure.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)
ISBN
978-1-7281-1328-9
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
29-32
Publisher name
Institute of Electrical and Electronics Engineers
Place of publication
Soul
Event location
Seoul
Event date
May 14, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000491257000012