well, like with Intell, I guess there is always a backdoor. There is nothing which cant be hacked. 

If you are a tech guy, there is a black hat [lecture](https://www.youtube.com/watch?v=7UNeUT_sRos&t=2404s) called **"Demystifying the Secure Enclave Processor"** like the chaos computer club, they really go in detail. The same problems we have with ledger Nano S and other hardware. 

When you can't trust the manufacturer or even the seller like eBay, you can't be sure that they don't mess with your privacy. But the government will not steal your money, they can print it. The only problem is that they can see what you are doing, but for that, they don't need your key.