A French security official was arrested last week on charges of selling state secrets and accepting bitcoin in return, local media sources say.
Malta's prime minister, Joseph Muscat, has told the U.N. that cryptocurrencies are "the inevitable future of money."
Europol has warned against the rising threats of cryptocurrency hacks and mining malware in a new report.
The Ukrainian parliament has introduced a bill outlining taxes on cryptocurrency-related profits.
The startup behind Brave Browser has filed regulatory complaints against Google over the "massive" amount of user data exposed in online advertising.
The chief of the European Central Bank, Mario Draghi, said Friday that the institution has "no plans" to issue a digital currency, Reuters reports.
The Russian state-owned conglomerate will develop a blockchain to manage data on its vast holdings, which include car, helicopter and firearms makers.
The European Commission will conclude a regulatory assessment of crypto assets this year, because "they are here to stay," says an official.
One European lawmaker wants to standardize ICO regulations, thereby making it easier for projects to raise funding across the EU.
A Brussels-based think tank believes the EU should enforce standardized regulations on cryptocurrencies for each member nation.