Blockchain Data Authenticity via Digital Signatures

The patent introduces a digital signature mechanism as an intermediary between the external data source and the blockchain network. The data provider signs the initial data with their private key, creating a cryptographic proof of authenticity. This signature acts as a trusted mediator that allows decentralized nodes to verify the origin and integrity of external data without requiring a central authority, thus resolving the contradiction between decentralization and verification capability.

The patent implements preliminary action by requiring data providers to sign data with their private keys before the data is accepted into the blockchain system. This pre-verification through cryptographic signing ensures that the authenticity and integrity of data are established before acceptance, preventing fraudulent or erroneous data from being introduced while maintaining ease of operation through automated signature verification.

The patent implements feedback through a verification mechanism where modified data is authenticated against the original signed data. When data is modified, the system verifies the modification by checking cryptographic signatures and hashes, providing feedback on whether the modification is authorized. This allows the system to adapt to legitimate modifications while maintaining data integrity by rejecting unauthorized changes.