The same question goes for how computationally expensive it is to generate a key that kinda-resembles a known key? If you are just eyeballing the key "yeah that

The same question goes for how computationally expensive it is to generate a key that kinda-resembles a known key? If you are just eyeballing the key "yeah that looks like Github's key" when the terminal ask you, you might fall for a fake one that merely begins with the same characters. The neat trick is that it's others of magnitude harder to find a key that kinda-resembles a known key and kinda-resmbles it's randomart, so if both are presented at the same time, you'd be safer.