The billionaire founder of Palo Alto Networks started a new cybersecurity company. Here's why many people are calling it 'crazy.'

The cofounders of Cylake, from left to right: Ehud (Udi) Shamir Nir Zuk, and Wilson Xu. Cylake Nir Zuk founded Palo Alto Networks in 2005, which now has a market cap of $125 billion. He retired last year and told Business Insider exclusively about his new startup, Cylake. It will protect highly regulated companies and organizations that cannot upload their data to the cloud. After more than 25 years building Palo Alto Networks into a $125 billion security giant, billionaire Nir Zuk is makin...