I think you hit the nail right on the head. "Encryption" at a low level, like using AES to encrypt a block of data, is pretty easy. But you need a lot more th

I think you hit the nail right on the head. "Encryption" at a low level, like using AES to encrypt a block of data, is pretty easy. But you need a lot more than that to build an encryption system like a secure communications channel. Each individual part is relatively easy to get right, but putting them all together offers a lot of opportunity for attackers to find a way to exploit the system.