Juan A. Garay, Aggelos Kiayias, Nikos Leonardos. The Bitcoin Backbone Protocol with Chains of Variable Difficulty. In Jonathan Katz, Hovav Shacham, editors, Advances in Cryptology - CRYPTO 2017 - 37th Annual International Cryptology Conference, Santa Barbara, CA, USA, August 20-24, 2017, Proceedings, Part I. Volume 10401 of Lecture Notes in Computer Science, pages 291-323, Springer, 2017. [doi]
Abstract is missing.