Cybersecurity researchers have uncovered a number of major security flaws in systems behind Hello Barbie, an Internet-connected doll that listens to children and uses artificial intelligence to respond. Vulnerabilities in the mobile app and cloud storage used by the doll could have allowed hackers to eavesdrop on private conversations, according to a report released recently by Bluebox Security and independent security researcher Andrew Hay. There is some disagreement on how serious a threat this is, but if you are considering buying one of these dolls you should make sure you understand the privacy concerns and what you can do to prevent unauthorized access.