Bypassing Tor Exit Blocking with Exit Bridge Onion Services
Bypassing Tor Exit Blocking with Exit Bridge Onion Services
复制标题
使用 Exit Bridge Onion Services 绕过 Tor 出口封锁
DOI:
10.1145/3372297.3417245
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Sherr, Micah
中科院分区:
文献类型:
--
作者:
Zhang, Zhao;Zhou, Wenchao;Sherr, Micah
Tor exit blocking, in which websites disallow clients arriving from Tor, is a growing and potentially existential threat to the anonymity network. This paper introduces HebTor, a new and robust architecture for exit bridges---short-lived proxies that serve as alternative egress points for Tor. A key insight of HebTor is that exit bridges can operate as Tor onion services, allowing any device that can create outbound TCP connections to serve as an exit bridge, regardless of the presence of NATs and/or firewalls. HebTor employs a micropayment system that compensates exit bridge operators for their services, and a privacy-preserving reputation scheme that prevents freeloading. We show that HebTor effectively thwarts server-side blocking of Tor, and we describe the security, privacy, and legal implications of our design.
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