Tell me more ×  When conducting surveys, an Administrator might
send an Enumerator to survey a Respondent. For "sensitive"
questions (e.g. about embarrassing behavior), the Respondent may
be fine with the truth being revealed to the Administrator but
not to the Enumerator.  Is there a way to create a one-way
function/process using simple (small and cheap) physical objects
such as pen and paper that isn't too time-consuming or involves
complex math? Inverting the function would be too hard for the
Enumerator during, or just after the survey, but the
Administrator could do it later. Assume that the Enumerator can
do anything quickly to uncover the answer (e.g. "accidentally"
open a sealed envelope or claim non-random data is random) so
long as the Administrator gets the truthful answer in the end.
Assume that this is the only interaction with the survey, so no
secret information has been passed among the Administrator and
the Respondent. FYI: Previous questions include ones about non-
computer/manual full crypto