1. WHO declares COVID-19 a pandemic;Cucinotta;Acta BioMed.,2020
2. Centralized or decentralized? The contact tracing dilemma;Vaudenay;IACR Cryptol. ePrint Arch.,2020
3. A study of the privacy of COVID-19 contact tracing apps;Wen;Proc. Secure Commun.,2020
4. Experts raise concerns about security of coronavirus tracing app COVIDSafe;Farrell;ABC Bews,2020
5. Bitcoin: a peer-to-peer electronic cash system;Nakamoto;Decent. Bus. Rev.,2008