$ ctf42

RSA_Decipher

Crypto weight 22.11 No technique tags yet.
Difficulty Not rated yet

A fresher intercepted a high-priority message from the tachyon head. The encryption protocol used is an old version of RSA. While the modulus is massive, the team made a curious choice for the public exponent, claiming it was for "computational efficiency."

He managed to figure out the public key and the intercepted ciphertext. Can you help him recover the secret message?

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