About the Blizzard authenticator

How secure is this. I was setting it up for this PC, i didn’t look before, sent the validation, then i saw it was sent over 3G network.

3G is known for a lack of security. Should i be worried? i don’t know how that thing works.

the pass code is constantly changing your save it’s not a realistic scenario for someone to get all the information they need by the time it changes again

My husband and I have both had one since they were available and have never had a single issue with security since.