##In October 2021, Guangdong strong net cup, CRYPTO's RSA AND BASE?

In October 2021, Guangdong strong net cup, CRYPTO's RSA AND BASE? Download the attachment, which is a txt file. Open it and find the RSA ciphertext and a codec table similar to base32, which also conforms to the hint of the title: . . As usual, use CTF-RSA-TOOL to run the RSA problem and find that it can run out: . . This should be the flag ...

Posted by LostNights on Thu, 14 Oct 2021 01:52:57 +0200