CID

CID, or Content Identifier, is a self-describing content-addressing identifier used in decentralized systems like IPFS and Filecoin. It's based on the content itself, not its location, providing a unique address for data. CIDs are created by applying a cryptographic hash function to the content, resulting in a fixed-size output that ensures data integrity and version control. With CID, accessing data is consistent, unlike traditional URLs which may change over time. It supports various hash functions, offering flexibility and security. In essence, CID is pivotal for identifying and sharing content in a decentralized digital environment.