alert
area
attention
camera
caution
cctv
control
crime
criminal
danger
design
digital
element
film
graphic
guard
hazard
icon
illustration
information
label
looking
monitored
monitoring
observe
police
privacy
private
protection
risk
robbery
safety
secure
security
see
sign
signal
silhouette
street
surveillance
symbol
system
theft
video
warning
watching
zone