Correct

失密

/ shī mì /
Strokes

Example

As a Verb

leak out a secret; give away confidential secrets/information

1
huà
计划
de
jié
细节
hěnkuài
很快
jiù
shī
le
  

Details of the plan soon leaked out.

2
Jǐnfáng
谨防
shī
失密

guard against leakage of secrets