In 3.4 of Passster I improved the capabitlites of passwords lists by a lot. Beside from adding a comma-separated list of passwords and reference it within the shortcode and page protection you can now use the updated expire options to further modify your authentication process.
Expire Passwords immediatly after usage
As the option describes, passwords will be automatically deleted after the first usage. “One-Time-Passwords” would another term to describe it.
Expire passwords after number of usages
You can set a number of usages for the list. This allows you to provide passwords which can only be used a number of times before they expire.
Expire passwords after time of first usage
You can set a timeframe the password will expire after the first usage. Hourly, daily, weekly and monthly are available for the selection.