Oracle problem
Definition
In blockchain contexts, the gap between what the ledger records and the real-world state it is meant to represent. A blockchain has no mechanism to verify that data submitted to it is genuine. The ledger faithfully records what was fed in; it cannot validate that input independently.
Related terms
- C2PA (Coalition for Content Provenance and Authenticity)
- An open technical standard that embeds cryptographically signed provenance assertions into media files at the point of capture or editing. A C2PA...
- Cryptographic hash
- A fixed-length digest produced from a file's bytes by an algorithm such as MD5 (128-bit), SHA-1 (160-bit), or SHA-256 (256-bit). Identical files...
- NFT (non-fungible token)
- A unique cryptographic token on a blockchain associated with a reference to a media asset. NFTs record ownership transfers and can carry...
- Permissioned ledger
- A distributed ledger in which participation is controlled by a known set of validators (for example, Hyperledger Fabric). Unlike public blockchains, a...
- Provenance manifest
- A structured record, either embedded in a file or stored externally, that documents a media asset's origin, capture conditions, chain of custody,...
Explained in
- Blockchain and Distributed Ledger Approaches to Media ProvenanceIn blockchain contexts, the gap between what the ledger records and the real-world state it is meant to represent. A blockchain has no mechanism to verify that...