Algorithm determinant dialog box is an editor for entering and changing the determinant in the hexadecimal format (Hexadecimal Editor):
Random numbers are written into the determinant by default upon creating the algorithm. They can be changed through forming the determinant yourself by entering new values directly into the editor window. You also can generate a new determinant automatically (button [Generate new value]).
GrdUtil.exe verifies the ‘quality’ of the determinant and returns the following warning if it does not meet its criteria:
Algorithm determinant dialog box control elements:
| Interface element | Description of purpose |
|---|---|
| Hexadecimal editor window | Allows to enter determinant value of hardware algorithm |
| [Load] button | Loads dump from *.dmp file |
| [Save] button | Saves dump into *.dmp file |
| OEM flag | Selects Windows/DOS encoding. Windows (ANSI) encoding is used by default – OEM option is off. |
| [Generate new value] button | Automatically creates new algorithm determinant |
| Additional control elements for the algorithm previously created | |
| Data Size dropdown list | Change a determinant size |
| [Change] button | Display the new determinant size in a HEX editor |
Changing the size of the determinant
For the algorithm being created previously, GrdUtil.exe permits the adjustment of the determinant size. In order to do this you need to select the required algorithm from the list of fields, execute Edit | Field Properties command and select Algorithm Determinant tab in the dialog box that appears.
The Data Size dropdown list on the left side of the dialog box serves to change the size of the determinant. After selecting the required size of the determinant, click the [Change] button next to the list and write the mask into the dongle.