@misc{cryptoeprint:2017:1242,
    author = {Taotao Li and Parhat Abla and Mingsheng Wang and Qianwen Wei},
    title = {Designing Proof of Transaction 	Puzzles for Cryptocurrency},
    howpublished = {Cryptology ePrint Archive, Report 2017/1242},
    year = {2017},
    url = {https://eprint.iacr.org/2017/1242},
}