Increasing Trust in Tor Node List Using Blockchain

HELLEBRANDT, Lukáš, Ivan HOMOLIAK, Kamil MALINKA a Petr HANÁČEK. Increasing Trust in Tor Node List Using Blockchain. In 2019 IEEE INTERNATIONAL CONFERENCE ON BLOCKCHAIN AND CRYPTOCURRENCY (ICBC). NEW YORK: IEEE, 2019, s. 29-32. Dostupné z: https://dx.doi.org/10.1109/BLOC.2019.8751340.

Základní údaje

Originální název

Increasing Trust in Tor Node List Using Blockchain

Autoři

HELLEBRANDT, Lukáš, Ivan HOMOLIAK, Kamil MALINKA a Petr HANÁČEK

Vydání

NEW YORK, 2019 IEEE INTERNATIONAL CONFERENCE ON BLOCKCHAIN AND CRYPTOCURRENCY (ICBC), od s. 29-32, 4 s. 2019

Nakladatel

IEEE

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Další údaje

Jazyk

angličtina

Typ výsledku

Stať ve sborníku

Utajení

není předmětem státního či obchodního tajemství

DOI

http://dx.doi.org/10.1109/BLOC.2019.8751340

UT WoS

000491257000012

Příznaky

Mezinárodní význam, Recenzováno

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Anotace

V originále

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.