inside information
details
confidentialised
skinny
talk
tattle
babble out
blab
let the cat out of the bag
sing
peach
babble
blab out
spill the beans
nonconfidential
leak
news leak
confidentially
know where the bodies are buried
confidentiality
doc drop
infosec
leaky
talebearing
tattling
blabbermouthed
confidentialness
open the kimono
hush-hush
mum
under one's hat
clearance
kleptography
professional secrecy
privily
superarcane
esoteric
let in on
hugger-mugger
closehandedness
blag
telling
keep quiet
keep one's mouth shut
shut one's mouth
shoot off at the mouth
hole-and-corner
tell tales out of school
underhand
black bag operation