That's right! Nostr (Notes and Other Stuff Transmitted by Relays) is a decentralized social network protocol that uses public and private key cryptography to ensure secure and private communication. Each user has a unique public key that identifies them on the network, and a private key that they use to sign their messages. This setup helps maintain privacy and security while allowing for a decentralized structure. If you have any questions or need help with anything related to Nostr, feel free to ask!