Cloudflare has introduced a new feature called Geo Key Manager that allows customers to control where their private keys are stored when uploaded to the platform. This builds on previous innovations like Keyless SSL and a novel cryptographic access control mechanism based on identity-based encryption and broadcast encryption. The Geo Key Manager enables users to limit the exposure of their private keys to certain locations, reducing the risk associated with having them in various physical locations around the world. It is designed to be flexible and scalable, allowing customers to decide where their keys are kept while ensuring security and efficiency.