Apparently not much, according to an article by Kaleigh Rogers in the Motherboard web site at http://goo.gl/fYKz2A.
Rogers focuses on the idea of someone hacking into the big databases used by genealogists at 23andMe, Family Tree DNA, Ancestry DNA, and similar companies. She points out that there are easier ways to obtain someone’s DNA than by trying to hack into encrypted databases:
“Someone could hack into your account on a genetics site, or even just collect your DNA from a used coffee cup and send it away for analysis—something New Scientist reporters proved was remarkably simple back in 2009.”
However, the article also describes “a case last year where police used a DNA sample from a murder and genetic information owned by Ancestry.com to create a ‘familial link’ to a filmmaker in New Orleans. Michael Usry, the filmmaker, had to provide police with a sample of his DNA, which did not match the DNA from the crime scene, but he said that becoming a suspect in a murder case he’d never even heard of was a nerve-wracking experience.”
You can read this interesting article at http://goo.gl/fYKz2A.