<PackageReference Include="Relativity.Services.DataContracts.SDK" Version="13.2.8" />

SecurityFieldRef

public class SecurityFieldRef : FieldRef
Represents the special Relativity View field that indicates if a RelativityObject has had its individual secuirty overridden, and if the user has permission to edit that items security.
public const string SECURITY_FIELD_NAME = "Security"

The constant value that will be used to determine if a given field is the special Security field

public string Name { get; }

The Name of the Security field is specificly the value of "Security"