@misc{ref1,
        author = "Wikipedia",
        title = "{RSA} (Cryptosystem) --- {W}ikipedia{,} {D}ie freie {E}nzyklopädie",
        note = "\url{https://en.wikipedia.org/wiki/RSA_(cryptosystem)}",
        year = "2016",
}

@misc{ref2,
        author = "Wikipedia",
        title = "{RSA}-{K}ryptosystem --- {W}ikipedia{,} {D}ie freie {E}nzyklopädie",
        note = "\url{https://de.wikipedia.org/wiki/RSA-Kryptosystem}",
        year = "2016",
}

@misc{ref3,
        author = "L. Van Houtven",
        title = "Crypto 101",
        note = "\url{https://www.crypto101.io}",
        year = "2016",
}
@misc{ref4,
        author = "Whitfield Diffie, Martin Hellman",
        title = "New Directions in Cryptographie",
        note = "\url{https://www-ee.stanford.edu/\%7Ehellman/publications/24.pdf}",
        year = "1976",
}
@misc{ref5,
        author = "R.L. Rivest, A. Shamir, and L. Adleman",
        title = "A Method for Obtaining Digital Signatures and Public-Key Cryptosystems",
        note = "\url{https://people.csail.mit.edu/rivest/Rsapaper.pdf}",
        year = "1978",
}