workshops/slides/censorship/censorship.md

Anti-censorship software

Censorship

• Blacklist vs whitelist
• DPI
• Active inspection
• DDoS
• Legal and financial

Centralized, Federated, Distributed

• Centralized < federated < distributed (P2P)
• More about this next monday

Torrent

• P2P
• Trackers and DHT
• Legal issues (Europe): using, sharing, hosting

Torrent

Blockchain

• Just P2P
• Decentralized ordering
• Financial censorship (Wikileaks, Autistici/Inventati, etc.)

HTTP

• Web proxy
• HTTP proxy
• Signal

SOCKS5 proxy

• Transport layer
• UDP ok
• SOCKS5h

Hosting censorship

• DNS censorship (TPB,Autistici/Inventati)
• Hosting provider choice
• Crypto payment for Domain and Hosting
• Self-hosted

Tor

• Created in 2002 by US Navy
• Low latancy
• Timing attack
• TCP only
• Hidden services (onion)
• Bridges
• Obfsv4

Tor

I2P

• Forked form Hyphanet (Freenet) in 2003
• High latency
• Timing attack resitant
• Better donors and origin
• It's own DNS (like Tor)
• Cant go outside of I2P network
• Torrenting is ok (special clients exist)
• Monero version

I2P

VPNs

• Not as good as previous (longevity and privacy)
• DIY

Proxychains

• Tor->I2P not allowed since July 2024
• Tor->SOCKS easy way to fix tor exit node issues