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It leverages [content addressing], [cryptographic hashing], and [self-describing formats]. It is the core identifier used by [IPFS] and [IPLD].\n\n\nSyntax\n---------\n\nAn IPLD content identifier in CBOR has tag 42 and is encoded as a byte string (major type 2). The CID is encoded in its binary representation (base256) and MUST be prepended by the identity [Multibase] prefix (a null-byte).\n\n\nExample\n-------\n\nThis CID `bafyreie74tgmnxqwojhtumgh5dzfj46gi4mynlfr7dmm7duwzyvnpw7h7m` is encoded as base32. When encoded as CBOR it will be converted to its (base256) binary representation. In this example it also has the identify Multibase prefix: `00017112209fe4ccc6de16724f3a30c7e8f254f3c6471986acb1f8d8cf8e96ce2ad7dbe7fb`. The binary text is then stored with tag 42:\n\n    D8 2A                                   # tag(42)\n       58 25                                # bytes(37)\n          00017112209FE4CCC6DE16724F3A30C7E8F254F3C6471986ACB1F8D8CF8E96CE2AD7DBE7FB\n\n\nAuthor\n------\n\nVolker Mische \u003c[volker@protocol.ai](mailto:volker@protocol.ai)\u003e\n\n[CBOR]: https://tools.ietf.org/html/rfc7049\n[CID]: https://github.com/ipld/cid\n[IPFS]: https://ipfs.io/\n[content addressing]: https://en.wikipedia.org/wiki/Content-addressable_storage\n[cryptographic hashing]: https://simple.wikipedia.org/wiki/Cryptographic_hash_function\n[self-describing formats]: https://github.com/multiformats/multiformats\n[IPLD]: https://ipld.io\n[Multibase]: https://github.com/multiformats/multibase\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fipld%2Fcid-cbor","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fipld%2Fcid-cbor","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fipld%2Fcid-cbor/lists"}