Security Enhancements for Data-Driven Systems: A Blockchain-Based Trustworthy Data Sharing Scheme

Table 1

Key notions.

Notions	Description
	Data concatenation
	Cryptographic hash functions
	Private/public key pair of a TEE
	Private/public key pair of DO
	Private/public key pair of DC
	Private/public key pair of CS
	Randomly generated key pair by DO
	Symmetric encryption and decryption
	Asymmetric encryption and decryption
	Signature under the secret key
	State key of smart contracts
	Reencryption key for DC
	Original ciphertext and reencrypted ciphertext