T0RTT: Non-Interactive Immediate Forward-Secret Single-Pass Circuit Construction

T0RTT: Non-Interactive Immediate Forward-Secret Single-Pass Circuit Construction

Maintaining privacy on the Internet with the presence of powerful adversaries such as nation-state attackers is a challenging topic, and the Tor project is currently the most important tool to protect against this threat. The circuit construction protocol (CCP) negotiates cryptographic keys for Tor...

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Bibliographic Details
Main Authors: Lauer Sebastian, Gellert Kai, Merget Robert, Handirk Tobias, Schwenk Jörg
Format: Article
Language:English
Published: Sciendo 2020-04-01
Series:Proceedings on Privacy Enhancing Technologies
Subjects:
tor
onion routing
circuit construction
ntor handshake
0-rtt
puncturable encryption
Online Access:https://doi.org/10.2478/popets-2020-0030
Description
Summary:Maintaining privacy on the Internet with the presence of powerful adversaries such as nation-state attackers is a challenging topic, and the Tor project is currently the most important tool to protect against this threat. The circuit construction protocol (CCP) negotiates cryptographic keys for Tor circuits, which overlay TCP/IP by routing Tor cells over n onion routers. The current circuit construction protocol provides strong security guarantees such as forward secrecy by exchanging 𝒪(n2) messages.
ISSN:2299-0984

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