What Is a “Hash” and How Does It Secure NFT Data?

A hash is a fixed-length string of characters generated from any input data using a cryptographic function. It is a unique "fingerprint." To secure NFT data, the hash of the off-chain metadata file is often included in the smart contract.

This proves the file has not been tampered with, as any change to the metadata would result in a completely different hash.

How Does a Checksum Differ from a Cryptographic Hash Function Used in a Blockchain?
What Is a Cryptographic Hash Function?
What Is a Cryptographic Hash and How Does It Link Blockchain Blocks?
What Is the InterPlanetary File System (IPFS) and Why Is It Used for NFT Metadata?
How Does the Metadata in an NFT Relate to the Token Standard?
What Are the Security Risks Associated with the “Off-Chain Reporting” Process Itself?
What Is the Primary Function of a Cryptographic Hash in a Blockchain?
What Cryptographic Primitive Is Primarily Used to Construct the Merkle Tree and How Does It Ensure Data Integrity?

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