Media type: E-Article Title: Information Security and Privacy: Fair Client Puzzles from the Bitcoin Blockchain Contributor: Boyd, Colin; Carr, Christopher imprint: Springer International Publishing, 2016 Published in: Information Security and Privacy Language: Not determined DOI: 10.1007/978-3-319-40253-6_10 ISSN: 0302-9743; 1611-3349 Origination: Footnote: