My problem with this is that it's effectively one-time use, only, if you're a high-enough-value target. Once you secret is "said" apart, over technology, it co

My problem with this is that it's effectively one-time use, only, if you're a high-enough-value target. Once you secret is "said" apart, over technology, it could be considered compromát. ---- Maybe have your "secret" be about a particular vacation or time period, using a novel recollection dependingupon severity of each conversation.