Scalable User Privacy, Spotify

https://engineering.atspotify.com/2018/09/scalable-user-privacy/

A common approach to GDRP in event sourced systems is crypto shredding. This article outlines Spotify’s homegrown Padlock system that manages encryption keys for each user at scale. Allowing them to effectively adhere to privacy laws around the globe and hopefully protecting the users at a greater level.