about security, its up to cic kun pano nila nachchek. meron siguro sila mga intel sa mga ganyan.
about sa timeline, there is no specific timeline per stage. ang giagawa ko dyan is tinitingnan ko timelines na available sa forums then nageestimate lang ako kung kelan. you can check the processing time here...
http://www.cic.gc.ca/english/inform...062.118779736.1517720969-968493849.1512540253
for as long as hindi pa naeexceed yun processing time as per cic, no worries. you can also request to update your status via IRCC webform.