obfs4
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This is a look-like nothing obfuscation protocol that incorporates ideas and concepts from Philipp Winter's ScrambleSuit protocol. The obfs naming was chosen primarily because it was shorter, in terms of protocol ancestery obfs4 is much closer to ScrambleSuit than...
Cost / License
- Free
- Open Source (BSD-2-Clause)
Platforms
- Go (Programming Language)
- Mac
- Linux
- Windows
- BSD
Features
- Network Traffic Obfuscation
- Obfuscation
obfs4 News & Activities
Highlights All activities
Recent activities
- POX added obfs4 as alternative to ISP Data Pollution, Fauxx and Payload Obfuscator
- POX added obfs4
obfs4 information
Developed by
Yawning AngelLicensing
Open Source (BSD-2-Clause) and Free product.Written in
Alternatives
3 alternatives listedSupported Languages
- English
GitHub repository
- 1,245 Stars
- 194 Forks
- 2 Open Issues
- Updated
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What is obfs4?
This is a look-like nothing obfuscation protocol that incorporates ideas and concepts from Philipp Winter's ScrambleSuit protocol. The obfs naming was chosen primarily because it was shorter, in terms of protocol ancestery obfs4 is much closer to ScrambleSuit than obfs2/obfs3.
The notable differences between ScrambleSuit and obfs4:
- The handshake always does a full key exchange (no such thing as a Session Ticket Handshake).
- The handshake uses the Tor Project's ntor handshake with public keys obfuscated via the Elligator 2 mapping.
- The link layer encryption uses NaCl secret boxes (Poly1305/XSalsa20).
As an added bonus, obfs4proxy also supports acting as an obfs2/3 client and bridge to ease the transition to the new protocol.