Privacy 51 privacy 51 human 40 Data privacy 34 adult 24 article 23 Humans 18 Privacy-preserving techniques 17 female 17 male 16 Article 15 Federated learning 13 Security 13 Blockchain 12 Internet of things 11 Privacy preserving 11 Block-chain 10 Cryptography 10 Privacy protection 10 security 10 Confidentiality 9 Network security 9 Differential privacies 8 Learning systems 8 Privacy & data protection 8 controlled study 8 Digital storage 7 GDPR 7 IoT 7 confidentiality 7