abstract
background
blurred
building
burglary
business
chase
compromising
concept
corridor
crime
criminal
design
development
elaboration
equipment
espionage
figure
hacking
hiding
human
ideas
illegal
industrial
industry
information
innovation
it
laboratory
last
man
material
multipath
multiple reflection
night
process
rereflection
robbery
secret
secretly
silhouette
space
spy
stealing
technology
theft
thief