# Full WriteUp

Full Writeup on our website: [https://www.aperikube.fr/docs/csawquals_2018/lowe](https://www.aperikube.fr/docs/csawquals_2018/lowe)

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# TL;DR

The key is encrypted using RSA with a small exponent (3), The key is small and no padding is applied so the cube root can be calculated to retrieve the key. Finally, a xor with the file gives the flag.