Explore a fascinating conference talk from Ekoparty 2024 that reveals vulnerabilities discovered in one of the world's largest electronic payment system providers, with over 2,300 installations across 70 countries. Dive into childhood dreams of unlimited arcade gaming while learning how security flaws were uncovered in this Argentine company's systems, which are implemented in various entertainment venues - from Brazilian arcades to amusement parks in the United Arab Emirates, and even a famous roller coaster in Las Vegas. Gain deep insights into API security, access control, and NFC technology, understanding how these vulnerabilities can be exploited and their potential impact on the gaming and entertainment industry.