What data is stored in CryptoDB?

Inquiring minds often seek clarity on the intricacies of technology, and I am here to pose a question about the enigmatic world of cryptocurrency databases. Specifically, I am curious to understand: what kind of data is actually stored in CryptoDB? Does it hold transaction records, user identities, or perhaps a combination of both? Are there any privacy measures implemented to ensure the safety of sensitive information? Furthermore, does CryptoDB utilize encryption to safeguard its data, and if so, to what extent? The answers to these questions will help shed light on the fundamental workings of cryptocurrency databases, and how they contribute to the security and integrity of the decentralized digital currency ecosystem.