Flash proxy is a pluggable transport and proxy which runs in a

web browser A web browser, often shortened to browser, is an application for accessing websites. When a user requests a web page from a particular website, the browser retrieves its files from a web server and then displays the page on the user's scr ...

. Flash proxies are an

Internet censorship Internet censorship is the legal control or suppression of what can be accessed, published, or viewed on the Internet. Censorship is most often applied to specific internet domains (such as ''Wikipedia.org'', for example) but exceptionally may ...

circumvention tool which enables users to connect to the Tor anonymity network (amongst others) via a plethora of ephemeral browser-based proxy relays. The essential idea is that the

IP address An Internet Protocol address (IP address) is a numerical label such as that is assigned to a device connected to a computer network that uses the Internet Protocol for communication. IP addresses serve two main functions: network interface i ...

es contingently used are changed faster than a censoring agency can detect, track, and block them. The Tor traffic is wrapped in a

WebSocket WebSocket is a computer communications protocol, providing a full-duplex, simultaneous two-way communication channel over a single Transmission Control Protocol (TCP) connection. The WebSocket protocol was standardized by the Internet Engineering ...

format and disguised with an

XOR cipher In cryptography, the simple XOR cipher is a type of ''additive cipher'', an encryption algorithm that operates according to the principles: :A \oplus 0 = A, :A \oplus A = 0, :A \oplus B = B \oplus A, :(A \oplus B) \oplus C = A \oplus (B \oplus C), ...

Implementation

free software Free software, libre software, libreware sometimes known as freedom-respecting software is computer software distributed open-source license, under terms that allow users to run the software for any purpose as well as to study, change, distribut ...

implementation of flash proxies is available. It uses

JavaScript JavaScript (), often abbreviated as JS, is a programming language and core technology of the World Wide Web, alongside HTML and CSS. Ninety-nine percent of websites use JavaScript on the client side for webpage behavior. Web browsers have ...

, and a

Python Python may refer to: Snakes * Pythonidae, a family of nonvenomous snakes found in Africa, Asia, and Australia ** ''Python'' (genus), a genus of Pythonidae found in Africa and Asia * Python (mythology), a mythical serpent Computing * Python (prog ...

implementation of the obfsproxy protocol, and was crafted by the Security Project in Computer Security at

Stanford University Leland Stanford Junior University, commonly referred to as Stanford University, is a Private university, private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth ...

. This work was supported by the Defense Advanced Research Project Agency (

DARPA The Defense Advanced Research Projects Agency (DARPA) is a research and development agency of the United States Department of Defense responsible for the development of emerging technologies for use by the military. Originally known as the Adva ...

) and the

Space and Naval Warfare Systems Center Pacific The Naval Information Warfare Center Pacific (NIWC Pacific), formerly the Space and Naval Warfare Systems Center Pacific (SPAWAR Systems Center Pacific or SSC Pacific), the Naval Command, Control and Ocean Surveillance Center (NCCOSC) RDT&E Divis ...

under Contract No. N66001-11-C-4022.

References

External links

The primary developer gives an overview at Stanford University

Floppydata
{{DEFAULTSORT:Flash proxies) Free routing software Cryptographic software Anonymity networks Internet privacy Proxy servers Free network-related software Free software programmed in Python

Implementation

See also

References

External links