Yahoo 知識+ 將於 2021 年 5 月 4 日 (美國東岸時間) 停止服務,而 Yahoo 知識+ 網站現已轉為僅限瀏覽模式。其他 Yahoo 資產或服務,或你的 Yahoo 帳戶將不會有任何變更。你可以在此服務中心網頁進一步了解 Yahoo 知識+ 停止服務的事宜,以及了解如何下載你的資料。

How can they sell ebooks so everyone can't simply email them to their friends?  How does that work?

1 個解答

相關度
  • 5 月前
    最愛解答

    When you buy a DRM'd ebook, your copy of it is encrypted with a key that's specific to your device or your account. If you send your copy of the book to someone else, they won't have that key, so they won't be able to read it - or not unless you want to trust them with the login details for your account.

    資料來源: I don't know the specifics of any retailer's DRM system, but I'm a software developer, and I've done some work with encryption.
還有問題嗎?立即提問即可得到解答。