@misc{cryptoeprint:2013:328,
    author = {Nicky Mouha and Bart Preneel},
    title = {Towards Finding Optimal Differential Characteristics for ARX: Application to Salsa20},
    howpublished = {Cryptology ePrint Archive, Report 2013/328},
    year = {2013},
    url = {https://eprint.iacr.org/2013/328},
}