From mboxrd@z Thu Jan 1 00:00:00 1970 From: matthieu castet Subject: password protected mmc/sd handling Date: Sun, 15 Jan 2012 18:16:12 +0100 Message-ID: <20120115181612.42883c75@mat-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from smtp6-g21.free.fr ([212.27.42.6]:41011 "EHLO smtp6-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751446Ab2AORQV (ORCPT ); Sun, 15 Jan 2012 12:16:21 -0500 Received: from mat-laptop (unknown [81.57.151.96]) by smtp6-g21.free.fr (Postfix) with ESMTP id E9C5282501 for ; Sun, 15 Jan 2012 18:16:14 +0100 (CET) Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org Hi, some sdcard support password protection. It can be useful on some embedded system (smartphone for example) where you don't want other people reading your data if you loose it (and you can't use encryption because of extra cpu usage). But that doesn't seem supported on linux. Is there any technical reason for that (not secure, not supported by all cards, ...) ? There was an attempt to support it 6 years ago [1], but it wasn't merged in the main kernel. Matthieu [1] http://thread.gmane.org/gmane.linux.kernel/373855