Roshan had a good reason to be scared—
Dividing his attention was one aspect, but on the other hand, hacking a military technology software system in a fraction of a second was simply impossible!
Lille managed to do it solely based on his powerful brain, an exaggerated amount of RAM, and his experience with higher versions of ICE, even military-grade ones.
Though he had never directly tried to hack military-grade ICE, he had at least seen it.
To build network barricades, he had been studying the basic principles and common architectures of ICE and then he remembered the Bimong.
True, he hadn't understood those things at the time, but that didn't mean he couldn't remember them.
Although the versions were hundreds of generations apart, the changes in thought were minimal; it was mostly just stacking material.
So, the cracking was both quick and effective—however, to the uninformed Roshan, it looked completely different.