Cryptography Digital storage 6 Security of data 6 Authentication 5 Network security 5 Security 5 Attribute-based encryptions 3 Block-chain 3 Blockchain 3 Cloud computing 3 Data Sharing 3 Encryption 3 Information management 3 Information security 3 Internet of things 3 Security systems 3 Trusted computing 3 'current 2 Access control 2 Ciphertext-policy attribute-based encryptions 2 Cloud infrastructures 2 Computation theory 2 Computer Security 2 Data transfer 2 Decentralisation 2 Decision making 2 Distributed computer systems 2 Distributed systems 2 Encryption algorithms 2 Hardware security 2