剛剛在 digg 讀到這篇文章, 教你怎麼破解 drm, 其實很簡單, 就是把受保護的 pdf 文件寄到 gmail, 然後再點 View as HTML 使該內容以 html 版本模式呈現, 這樣你就可以任意複製該內容了, 這就跟用 google 搜尋到 pdf 文件時可以選擇 HTML 版來瀏覽該內容一樣.
# Open the file with Adobe Reader and click on the “Lock” icon in the down-left corner to see which restrictions apply. Our example file can be printed, but editing or text extraction is not allowed.
# Send the file as an attachment to your Gmail account.
# Open the mail you’ve sent yourself and choose the “View as HTML” option below the (empty) mail body.
# An HTML version of the encrypted file is displayed — part of the layout might be gone, but the text can be extracted with a simple copy/paste command. In case the original PDF file had printing restrictions, those are stripped as well.