Tags: crypto rsa 

Rating:

* `len(m)` count of RSA ciphertexts are given, which is the result of encryption of the `i`-bit-right-rotate-shifted values of plaintext $m$.
* $N=2^{n_1}3^{n_2}7^{n_3},e$ is unknown

### Solution

* $N$ is the even number, so the evens will be encrypted to the evens and the odds be the odds

`zer0pts{0h_1t_l34ks_th3_l34st_s1gn1f1c4nt_b1t}`

{%gist hakatashi/fac3ce50f0e7febc4db7f5d7768246d9 %}

Original writeup (https://hackmd.io/@hakatashi/BkG7zhfSU#ROR-Crypto-260pts).