Of course, it is very early in this hypothetical battle between quantum computers and cryptocurrencies. So far in this war not a single shot has been fired. Moreover, new developments not considered in the Aggarwal analysis are possible in both areas that could radically change everything. We live in interesting times.
Computing and Bitcoin:
"Quantum attacks on Bitcoin, and how to protect against them", Divesh Aggarwal, Gavin K. Brennen, Troy Lee, Miklos Santha, and Marco Tomamichel, (October-2017); arXiv:1710.10377 [quant-ph]
John Cramer's new book: a non-fiction work describing his Transactional Interpretation of quantum mechanics, The Quantum Handshake - Entanglement, Nonlocality, and Transactions, (Springer, January-2016) is available for purchase online as a printed or eBook at: http://www.springer.com/gp/book/9783319246406 .
SF Novels by John Cramer: my two hard SF novels, Twistor and Einstein's Bridge, are newly released as eBooks by Book View Cafe and are available at : http://bookviewcafe.com/bookstore/?s=Cramer .
Columns Online: Electronic
reprints of about 195 "The Alternate View" columns by John G. Cramer,
previously published in