I don't think I'm breaking any confidence by telling you that he plans to write another book.我想我告诉你他计划写另一本书不是不守信用。Many people consider her decision to be a breach of trust/confidence.很多人都认为她的决定不守信用/违背保密原则。She accused her landlord of bad faith because he had promised to paint the apartment but never did it.她指责房东不守信用，因为他承诺过要粉刷公寓但一直没有兑现。