In Windows, what constitutes a SID?
For clarity, I understand the OS creates a SID for a security principle-computer, user or group, And the SID created is a unique number. However, in my ignorance is this number unique to each item or rather unique to the type of item. (E.g. Computer (regardles of type = 100), user (regrdles of name = 200) and group: admin = 500, domain admin = 501, users = 101, Everyone = 201.
The reason I ask for further understanding is a SID unigue to resources and users like Social Security numbers are, no to users, group or computers will have the same SID?