This is the first slide of the canceled DEF CON presentation on subway vulnerabilities. The students performed their research as part of 6.857 (Computer and Network Security). Students’ DEF CON Presentation Aug. 25, 2008 Facebook Twitter Reddit Print This is the first slide of the canceled DEF CON presentation on subway vulnerabilities. The students performed their research as part of 6.857 (Computer and Network Security). Students’ DEF CON Presentation