Decrypt the cipher text with a pinhole. $ nc cry1.chal.ctf.westerns.tokyo 23464 pinhole.7z Summary: attacking RSA using decryption oracle leaking 2 consecutive bits in the middle.
Here is a RSA private key with its upper part masked. Can your recover the private key and decrypt the file? equation.zip Summary: recovering RSA key from part of the private key.
We’ve got a screenshot of some encryption, here’s the text transcribed. Please say what’s there. Summary: a couple of modular equations
You get arbitrary code execution…. as long as it’s code we approve of. Source available at blech.py Service running on 184.108.40.206 port 1234 blech.py Summary: RSA cube root attack