Up to now, even with media exposure and a bounty, no one found a flaw.
No flaw has been disclosed. There is a subtle difference. (Presumably anyone finding a significant flaw would stand to gain more by not disclosing it, no?)
Not really. Think of the HPC and Big Data giants. They have a great interest to find a flaw. Many of them contact us to see how they will be able to keep their business with Xennet. Mentioning Xennet, let me say that we'll modify its name soon, cause of
https://www.dropbox.com/s/am2g3jk5jo60itz/XENNET%20Ltr.pdf?dl=0