I'm relatively new to bitcoins in general.  About a month ago I started getting into them.  My father-in-law who works for a computer company found out last week that I was getting a miner and has now convinced my wife that this is a scam and that I'll be helping to destroy encryption.  Granted he didn't know about bitcoins before last week.  I tried my best to explain to him that he's incorrect but with very little luck.

Any ideas, or articles or sites that I can show him to make him realize that he's incorrect in this area and make my home life much better than it is currently?