Blockchain across Oracle

Cryptographic protocol, hash functions, and digital signatures

These three capabilities—cryptographic protocols, hash functions, and digital signatures—secure and digitally sign the data in the blockchain. A cryptographic protocol performs a security-related function by applying cryptographic methods, and it describes the algorithms such as hash functions should be used. The protocol used by a blockchain usually incorporates at least these aspects:

• Entity authentication
• Public/private key cryptography
• Secured application-level data transport
• Fingerprint/signature generation
• Data encryption methods

To prove that the data on the blockchain has not been tampered with, transactions, blocks, and participating nodes are signed by generating digital ...