@misc{cryptoeprint:2017:765,
    author = {Vahid Amin Ghafari and Honggang Hu and Mohammadsadegh alizadeh},
    title = {Necessary conditions for designing secure stream ciphers with the minimal internal states},
    howpublished = {Cryptology ePrint Archive, Report 2017/765},
    year = {2017},
    url = {https://eprint.iacr.org/2017/765},
}