(someone's) secret is safe with (one)

(someone's) secret is safe with (one)

One will not divulge the secret that someone else has shared with one. A: "Please don't share that information with anyone else!" B: "Don't worry—your secret is safe with me!" The legal consultant assured me that our secrets are safe with him.
See also: safe, secret
Farlex Dictionary of Idioms.

Your secret is safe with me.

I will not tell your secret to anyone. Don't worry. I won't tell. Your secret's safe with me. Your secret is safe with me. I will carry it to my grave.
See also: safe, secret
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • discipline
  • discipline (one) for (something)
  • discipline for
  • cast (one's) lot in with (someone or something)
  • cast lot in
  • (I) won't tell a soul
  • all in (one's) head
  • don't get me wrong
  • don't beat a dead horse