Explore the implications of the massive Yandex source code leak in this 22-minute conference talk from BSidesLV. Delve into the revelations about how major tech companies utilize user data, as exposed by the leak of nearly 45 GB of Yandex's source code in January 2023. Examine the contents of the leak, including code for key services like Metrika and Crypta, which provide insights into user analytics and behavioral tracking. Gain a rare insider's perspective on the data collection and analysis practices of big tech firms, uncovering both intriguing and concerning aspects of how personal information is processed and utilized. Learn about the broader implications for user privacy and data security in the digital age.