TSPU: Russia's Firewall and Defending Against Digital Repression
Benjamin Mixon-Baca
DEF CON 33 · Day 1 · Main Stage
Benjamin Mixon-Baca delivered a deeply technical dissection of Russia's TSPU (Tekhnicheskoe Sredstvo Protivodeystviya Ugrozam, or Technical Means to Counter Threats) — the in-path deep packet inspecti
AI review
Deep technical dissection of Russia's in-path TSPU/EcoFilter DPI infrastructure, two novel TCP bypass techniques (simultaneous-open and five-ACK client-side), and a well-documented exposure of backdoored PLA-linked VPN apps with hardcoded ShadowSocks encryption keys. Excellent cross-domain breadth; some findings are more finished than others.