6 years is a short time in cryptography. That isn't battle-tested.

"Even worse, security doesn't provide immediate feedback. A dead patient on the operating table tells the doctor that maybe he doesn't understand brain surgery just because he read a book, but an insecure cryptosystem works just fine. It's not until someone takes the time to break it that the engineer might realize that he didn't do as good a job as he thought. Remember: Anyone can design a security system that he himself cannot break. Even the experts regularly get it wrong." -- Bruce Schneier

Source: https://www.schneier.com/crypto-gram/archives/2009/0915.html