A system for managing bets comprises a memory and a processor. Then a processor creates a voice model of the party, the voice model being created by processing the speech, without notifying the party. The processing unit measures multiple voltage levels provided by the arcing sense circuit during a specified number of consecutive time periods. Some preferred methods are effective against both external attacks and those benefiting from assistance or information provided by those with administrative access. The invention also relates to the dyeing methods and devices using it.