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RSA decryption given C (Cipher Text), e, and d

mx flag

I am given C, e, and d to decode an RSA ciphertext (or would it be SRA given this information?), and I am thoroughly confused. I have tried working backward to n by reversing modulo operators and then brute forcing scalars, but nothing is working, is this even possible? Many thanks in advance.

fgrieu avatar
ng flag
That follows [another duplicate](https://crypto.stackexchange.com/q/105734/555) of this [recent question](https://crypto.stackexchange.com/q/105734/555). There is now little doubt this is a thinly disguised CTF, homework or similar. No matter how interesting and fun, this is off-topic. And perhaps we should be taking with a grain of salt the [statement that's a finished CTF](https://crypto.stackexchange.com/posts/comments/226368).
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