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Essentially I'm asking, what if I have designed a quantum-proof stream cipher that is faster than AES-256?

Will using less computational power for encryption/decryption be valuable to companies or various organizations?

I can imagine that faster and lighter encryption while secure enough could potentially cut down costs or give a competitive advantage to a business. (like Google)

However, I would highly appreciate it if you can bring up a few examples that the value of this could make someone pay for a more efficient* encryption algorithm.

*Faster, more secure & using less computational power.

Tunnel_Vision
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The obvious market for such a cipher is for lightweight internet-of-things devices where production costs need to be kept small and battery life needs to be maximised (e.g. if device access is hard such as with a pacemaker or satellite component). Minimising the circuit size and power consumption in these constrained circumstances is highly desirable.

It is for these reasons that NIST is in the final stages of a process to choose such a cipher suitable for standardisation. In other words, you should aim to be more efficient than the winner(s) of this process rather than AES. Even then the economic savings would have to be significant for implementors to assume the potential liability associated with a non-standard algorithm.

Daniel S
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