Your front door isn't a hardened steel vault door... I'm assuming you still lock it. This is a bad analogy, even it it's apt. Only in that an encryption schem

Your front door isn't a hardened steel vault door... I'm assuming you still lock it. This is a bad analogy, even it it's apt. Only in that an encryption scheme can be technically weaker than another, but still plenty secure. As long as it does the job and hasn't been broken. For example, part of the spec is simply hashing and packet signing... not necessarily making the packets secret, but authenticating the origin/source. It isn't necessarily about creating the most secure vault in the world, but securing what might otherwise be completely insecure channels of communications/attack. It's also not about a $1000 smart phone, but a micro controller that's a fraction of a dollar on devices that have a total BoM that is very low cost or small.