1. Glaser F, Zimmermann K, Haferkorn M, Weber MC, Siering M (2014) Bitcoin-asset or currency? Revealing users’ hidden intentions. In: Proceedings of the 22nd European conference on information systems, Tel Aviv, June 2014
2. Moore T, Christin N (2013) Beware the middleman: empirical analysis of bitcoin-exchange risk. In: Sadeghi AR (ed) Financial cryptography and data security. FC 2013. Lecture notes in computer science, vol 7859. Springer, Berlin
3. Hileman G, Rauchs M (2017) Global cryptocurrency benchmarking study. Cambridge Centre for Alternative Finance.
https://ssrn.com/abstract=2965436
4. Conti M, Kumar S, Lal C, Ruj S (2018) A survey on security and privacy issues of bitcoin. IEEE Comm Surv Tutor.
https://doi.org/10.1109/COMST.2018.2842460
5. ur Rehman H, Nazir M, Mustafa K (2018) Comfort level security–a multi-factor authentication framework. Int J Appl Eng Res 13(17):13166–13177