Does Sitecore 8 keep role based security -

i used sitecore actively version 5 through 7, haven't had work on 2 years now. colleague of mine asking security because had heard assertion item permissions must assigned on user user basis , there no concept of role. can definitively answer experience , documentation sitecore version 7 , below both allowed , highly encouraged conforming accepted best practice of assigning access based on role/group , cannot imagine world have gone away in version 8, have no documentation or actual experience version 8 definitively still supports role based security. there working version 8 can confirm?

yes sitecore 8 supports role based security , practice define security based on roles instead of users.