Consider a dissident in a totalitarian state who wishes to share a modified bit of software with fellow dissidents, but does not wish to reveal the identity of the modifier, or directly reveal the modifications themselves, or even possession of the program, to the government.
考虑一个在极权国家的持不同政见者，他想要和同样的持不同政见者分享一个修改过的软件，但不希望向政府透露修改人的身份或修改本身，甚至是藏有该程序的消息。