{"release":"Rel-20","nodes":[{"number":"33.21U","type":"TS","title":"Security requirements","series":33,"status":"Withdrawn under change control","initial_release":"UMTS","primary_group":null,"portal_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=2868"}],"edges":[]}