01112nas a2200205   4500000000100000000000100001008004100002260000900043653001500052653002100067653001900088653001800107653002700125100001800152700001700170245008400187300001000271490000700281520061800288       2019                            d  c201910ablockchain10aCounterterrorism10acryptocurrency10aCybersecurity10ainternational security1 aSean Costigan1 aGreg Gleason00aWhat If Blockchain Cannot Be Blocked? Cryptocurrency and International Security  a13-200 v433 a<p>Pariah states and criminal gangs are often early adopters of disruptive technologies. With blockchain, the possibilities for circumventing controls and systems--or creating new ways of business--are rich grounds for such early adopters. What has gone widely ignored in the buzz around cryptocurrencies is the role that states play and their changing perspectives on the matter. This article analyzes the geo-strategic implications of a suite of technologies that has the possibility of altering core economic tenets about money and, along the way, attracting the attention of those who would skirt the law.</p>