What is a Handshake domain?

Could you please elaborate on what exactly a Handshake domain is? As someone new to the cryptocurrency space, I'm intrigued by the concept but not entirely clear on its purpose and functionality. How does it differ from traditional domain names, and what advantages does it offer for users looking to navigate the decentralized web? Is it a type of blockchain-based domain system, and if so, how does it ensure security and privacy for its users?