@misc{cryptoeprint:2015:1080,
    author = {P. Freyre, N. Díaz and O. Cuellar},
    title = {Variations to the cryptographics algorithms AES and TWOFISH},
    howpublished = {Cryptology ePrint Archive, Report 2015/1080},
    year = {2015},
    url = {https://eprint.iacr.org/2015/1080},
}