Hacker-proof code confirmed

The aspiration to create formally verified software has existed nearly as long as the field of computer science. For a long time it seemed hopelessly out of reach, but advances over the past decade in so-called “formal methods” have inched the approach closer to mainstream practice. Today formal software verification is being explored in well-funded academic collaborations, the U.S. military and technology companies such as Microsoft and Amazon.

~ Kevin Hartnett from, https://www.quantamagazine.org/20160920-formal-verification-creates-hacker-proof-code/