There are two ways to do double-key verification in SimpleIndex.
When there is one operator, simply configure 2 index fields with the same name. The index value can only be saved if the 2 fields match.
If there are multiple operators, you can accomplish the same thing using “Database Update Mode”. The first user keys the value, and that is saved in the database to Field 1. The 2nd user uses a configuration that has two fields with the same name–one that reads the value from Field 1 and another that is mapped to Field 2 (initially blank). The 2nd user keys the value into Field 2 and will only be allowed to save it if the value matches Field 1.
We recommend contacting our professional services department before attempting to setup double-key verification in a multi-user environment, as this is one of the more complicated configurations that SimpleIndex supports.