Nothing could stop you from rolling the die until you get the wanted number, and then only publishing one result.
To be credible, you’d need a RNG that you can’t use without everyone else knowing that you did (if not the specific result), which usually means a third party.
Online D&D uses trusted die-roller websites that keep logs of all the rolls made under one’s name; you could have a variant where they just publish a hash of the results, rather than the results themselves.
Nothing could stop you from rolling the die until you get the wanted number, and then only publishing one result.
To be credible, you’d need a RNG that you can’t use without everyone else knowing that you did (if not the specific result), which usually means a third party.
Online D&D uses trusted die-roller websites that keep logs of all the rolls made under one’s name; you could have a variant where they just publish a hash of the results, rather than the results themselves.