> Other than DNA sequences I can't think of a good person key.
In theory, one could use 3D geoposition at time of birth, time of birth, and sibling order (for twins / triplets / etc delivered surgically), where said order is dictated by the parent(s) or ob/gyn present. Of course, the main problem with this in practice is that not everybody has this information.
I would have said you could do something via retinal imagery, but not everybody has eyes. If we had non-invasive neural imagery, would it maybe be possible to derive a key from a simplification of a person's physical brain topology?
In theory, one could use 3D geoposition at time of birth, time of birth, and sibling order (for twins / triplets / etc delivered surgically), where said order is dictated by the parent(s) or ob/gyn present. Of course, the main problem with this in practice is that not everybody has this information.
I would have said you could do something via retinal imagery, but not everybody has eyes. If we had non-invasive neural imagery, would it maybe be possible to derive a key from a simplification of a person's physical brain topology?