This is Bleichenbacher's rump-session e=3 RSA attack. It's pretty straightforward, and is in Cryptopals if anyone wants to try it. If you don't check all the RS

This is Bleichenbacher's rump-session e=3 RSA attack. It's pretty straightforward, and is in Cryptopals if anyone wants to try it. If you don't check all the RSA padding, and you use e=3, you can just take an integer cube root.