LEV536 The Torah [this verse] prohibits a person from being a talebearer. Normally, we would think of this prohibition as one against gossip only. But since Proverbs (20:19) linked talebearing with telling secrets, the prohibition against revealing any information is derived from here. In defining the actual sin, one decisor (Sefer Mitzvot Gedolot, Negative Prohibition 9) lists revealing secrets as the main prohibition. If not the main sin, according to other commentaries, revealing secrets is certainly part of the prohibition of talebearing. Even when revealing secret information seems to be hurting no one, it is still prohibited in Judaism.