EraserUtilDrv11220.sys is not sign By Symantec?

Hi all, how are you?

i would like to ask 2 importent questions about EraserUtilDrv11220.sys file under: Program Files (x86)\Common Files\Symantec Shared\EENGINE

1. Does anyone have any information of this file (EraserUtilDrv11220.sys)

2. Why the file is not sign By Symantec herself?

Thanks.