DATA RECORDING

All data, including data pertaining to unauthorised starts, is recorded in the interlock's internal memory which has an independent power source so that it cannot be lost as a result of a power interruption. Thus, not only will data be preserved in the event of an interruption in the vehicle's power supply; the fact of the power interruption itself will be recorded on the events log. The information to be logged will be determined by the authorities concerned, and provides the foundation for analysis of the participant's involvement in the program.

As one of the privacy aspects, events log data is recorded in an encrypted form, and downloading requires specialized equipment and proprietary software. The software has diagnostic capabilities which enable it to detect corrupted or altered data, thereby ensuring that illicit attempts to circumvent program rules by altering or erasing events log data will be identified as such so that appropriate action may be taken.

The WR2 device will record up to 10,000 events in its memory. This is sufficient to enable normal use over a period of 67 days. In the event the memory capacity is used within a shorter period of time, the device will signal an early recall in order to download data and clear the events log. This provides a reasonable assurance that no events will go unrecorded while the interlock is installed in the vehicle. The WR2 records over 50 different event types associated with the use of the device and the vehicle. These include: