Of course if you implement encryption yourself you almost certainly did it wrong and are leaking data. This assumes you even know how to "do it yourself".

I didn't mean "write your own solution", I meant:

You can only trust public key encryption and you need to create all keys yourself and you need to have 100% exclusive access to the private key.

And then, you need to pray and hope that the NSA hasn't figured out a way around it and won't too soon.