~/talk

Broken Promises: Who's Accountable When VPNs Fail?

Talkat USENIX Security '26 · 2026-08-12..08-14· [security]
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slides:none on file

Systematic research over five years tests over a thousand users, nine VPN providers and hundreds of desktop and mobile apps and finds concrete failures: kill switches leak real IPs during tunnel failures, DNS queries escape tunnels, apps transmit cleartext, deliver OpenVPN configs unencrypted and exfiltrate advertising IDs. A simple mobile test framework called Immobilizer and a VPN App Analyzer reveal that 88% of top free VPNs had at least one issue and 290 apps account for 2.2 billion installs. Recommendations: app-store prepublish audits, ongoing monitoring, and revocation for proven violators.

AI-written summary · about

  1. 0:00VPN accountability challenges
  2. 2:28VPN adoption surge
  3. 4:17VPN vulnerabilities research
  4. 6:27Mobile VPN security failures
  5. 7:54Users cannot fix VPN alone
  6. 10:03Journalism limits on VPN change
  7. 11:50Regulatory actions on VPNs
  8. 12:52App Stores leverage for change
  9. 15:20Stricter VPN app store policies
  10. 17:28Call to action for researchers
  11. 19:13Q&A
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