“Tech industry giants say they are alarmed the federal government would demand back-door access to the encryption built into their products. Are they crying crocodile tears? Maybe, but the point is still a good one. Imagine if, instead of memory chips, we were talking about your home’s back door. It most likely contains a lock. Your family members have keys. They can come and go freely while others cannot. This is how locks should work. The FBI says it can’t do its job unless it has unimpeded access to your house, so it asks you to give it a spare key. The FBI further promises it will only use the key to enter your home in emergencies. Would you give it to them?”
http://www.thedailybell.com/news-analysis/36308/Back-Door-Worse-Than-No-Door/