Say you can add or not ad one or more of 10 different benign substances to gunpowder. Then detect presence of each (e.g. ) to get a 10-bit value. This gives 1024 different values you can encode, to denote which batch of powder it is.
Say you can add or not ad one or more of 10 different benign substances to gunpowder. Then detect presence of each (e.g. [XRF](https://en.wikipedia.org/wiki/X-ray_fluorescence)) to get a 10-bit value. This gives 1024 different values you can encode, to denote which batch of powder it is.
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