Increasing Trust in Tor Node List Using Blockchain

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Increasing Trust in Tor Node List Using Blockchain

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Increasing Trust in Tor Node List Using Blockchain

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)

ISBN

978-1-7281-1328-9

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

29-32

Název nakladatele

Institute of Electrical and Electronics Engineers

Místo vydání

Soul

Místo konání akce

Seoul

Datum konání akce

14. 5. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000491257000012