Vulnerabilities in Cryptocurrency
https://eprint.iacr.org/2013/151.pdf https://pub.tik.ee.ethz.ch/students/2015-FS/BA-2015-10.pdf http://preshing.com/20140127/what-is-a-bitcoin-really/?lipi=urn%3Ali%3Apage%3Ad_flagship3_feed%3Bc6R4CJoqQKuimzMviU8MXQ%3D%3D