Re:How is NSA breaking so much crypto? (2015)
by 0x0 on Saturday December 17, 2016 @10:59AM
(#13201115)
It's never a no-risk addition. Perhaps your custom code is buggy and ends up adding in random memory contents that happened to contain both your AES key and your custom crypto key, into the message payload ala heartbleed.
So even if it's actually true, and that you shouldn't roll your own encryption in practice, even if they do break yours they'll still have to get through the AES as well. So it's a no risk addition.