<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">2013/8/2 于运超 <span dir="ltr"><<a href="mailto:wuyaalan@gmail.com" target="_blank">wuyaalan@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
can u tell </blockquote></div><br>This link maybe help u: <a href="http://en.wikipedia.org/wiki/Encrypting_File_System">http://en.wikipedia.org/wiki/Encrypting_File_System</a></div></div>