Blockchain-Enabled Public Key Encryption with Multi-Keyword Search in Cloud Computing

Table 1

Main symbols.

Symbol	Meaning
	Public/secret key pair of data owner
	Public/secret key pair of data user
	Public/secret key pair of cloud server
	Shared key for data owner and data user
	Encrypted file index
	Encrypted file index set
	File index set
	Returned file set
	Ciphertext set of
	Packed ciphertext
	Keyword dictionary
	Index set for
	The intermediate value
	The final value
	Queried keyword set
	Trapdoor for
	Location set of in