Snowflake

E555946

Snowflake is a censorship-circumvention system that helps users access the Tor network by routing their traffic through volunteer-run proxy nodes embedded in ordinary web browsers.

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Statements (49)

Predicate Object
instanceOf Tor pluggable transport
censorship-circumvention system
aimsTo make blocking by censors more difficult
brokerRunsOn Tor infrastructure NERFINISHED
category internet censorship circumvention tool
privacy-enhancing technology
clientRunsOn censored user’s device
codeRepository https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake
connectionType one-off short-lived proxy connections
temporary ephemeral proxies
connectsTo Tor bridges
designedFor users in heavily censored countries
designedToBe easy for volunteers to run
hard for censors to enumerate
developedFor Tor network NERFINISHED
documentationURL https://community.torproject.org/relay/setup/snowflake/
hasComponent Snowflake broker
Snowflake client NERFINISHED
Snowflake proxy
hasPurpose censorship circumvention
help users access Tor from censored networks
license free and open-source software license
maintainedBy Tor Project NERFINISHED
networkModel client-broker-proxy-bridge architecture
obfuscates network paths between user and Tor network
partOf Tor pluggable transports ecosystem NERFINISHED
proxyImplementedAs embedded JavaScript in web pages
web browser extension
proxyRunsOn volunteer’s web browser
relatedTo Tor Browser NERFINISHED
meek
obfs4
requires volunteer participation
routesTrafficThrough volunteer-run proxy nodes embedded in web browsers
securityProperty end-to-end encryption via Tor
resistance to IP-based blocking
resistance to simple DNS-based blocking
supports Onion Browser (via Tor pluggable transports) NERFINISHED
Orbot NERFINISHED
Tor Browser NERFINISHED
trafficType encrypted Tor traffic
usedBy users in China
users in Iran
users in Russia
users in other censored regions
uses domain fronting (historically, depending on deployment)
volunteer-run proxy nodes
webRTC
usesDiscoveryMethod broker-based proxy discovery

Referenced by (1)

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The Tor Project develops Snowflake