Dell OptiPlex 980 (Early 2010) - Manual (Page 43)

Adding Customized Hash
When the Insert key is pressed in the Manage Certificate Hash screen, the following screen is displayed:
To add a customized certificate hash: Type the hash name (up to 32 characters). When you press Enter, you are
prompted to enter the certificate hash value.
The Certificate hash value is a hexadecimal number (for SHA-1 it is 20 bytes for SHA-2 it is 32 bytes). If the value is not
entered in the correct format, the message “Invalid Hash Certificate Entered - Try Again” is displayed. When you press