Any equation that can be produced by one chip can be produced by another - hell, even the old WWII "Enigma" machines can be translated to software.
#Wireless keyboard for mac aside from apple software
Secure Enclave is both hardware and software (It has its own processor and hardware protection on its memory access). The signal on the RF (wireless) has to be created somehow. It's the blend of hardware and software that's usually the key(!). So here, they developed a chip to recognize your fingerprint, using their own touched technology, that then encrypts the data, and sends an encrypted signal to the computer. They developed the Secure Enclave and it’s software too, remember.
We all know Apple develops its own chips, and that they develop specialized chips for particular functions.
Why doesn’t it make sense? At the present AI=tion they said that they developed a new chip for the keyboard that was encrypted, so it would send an encrypted signal to the computer. But I wouldn't put it past any tech company to get sort of hand-wavey and call "a secure signal running on an obscure non-wifi/bluetooth piece of open spectrum with a custom antenna" a "new chip," especially if it happens to be on a chip that is new (even if that's the least relevant piece of the equation). That doesn't make any sense though, the chip doesn't matter, what counts is the signal it's sending. But it seems they solved the problem with, what else, a new chip.