Hacking and G-d

DDoS doesn't work "He is available to all those who call to Him in truth"
MiTM(man in the middle) - Its possible for the evil inclination to hijack ones energy and resources for evil purposes, but that can always be fixed.

2FA- 2 factor authentication

2FA is a two step process to make sure that you really are you. Aside from a password, a code is sent a number and that has to be entered before one can access the site
We find this in the Torah with Yakov. When it came to marrying Rochel he not only asked the regular questions, he also gave her 3 signs to verify. (these were the 3 mitzvot of a Jewish women as stated in the Midrash.) It didn't work because the security was comprimised when she revealed all the info to Leah (with good intentions)