The post ‘Legacy system’ exposed Black Hat 2018 attendees’ contact information appeared first on BardTech . A “legacy system” was to blame for exposing the contact information of attendees of this year’s Black Hat security conference. Colorado-based pen tester and security researcher who goes by the handle NinjaStyle said it would have taken about six hours to collect all the registered attendees’ names, email and home addresses, company names, and phone numbers from anyone who registered for the 2018 conference. In a blog post , he explained that he used a reader to access the data on his NFC-enabled conference badge, which stored his name in plaintext and other scrambled data. The badge also contained a web address to download BCard, a business card reader app. After decompiling the BCard app, the researcher found an API endpoint in its code, which he used to pull his own data from the server without any security checks. By enumerating and cycling through unique badge ID numbe...