@misc{cryptoeprint:2016:716,
    author = {Tuyet Duong and Lei Fan and Hong-Sheng Zhou},
    title = {2-hop Blockchain: Combining Proof-of-Work and Proof-of-Stake Securely},
    howpublished = {Cryptology ePrint Archive, Report 2016/716},
    year = {2016},
    url = {https://eprint.iacr.org/2016/716},
}