linux-kernel - Re: [PATCH 00/14] EVM

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Message-ID: <AANLkTinDRHqf4_pidFdmfqb4r_xJbFbM2DN-40Xva6re@mail.gmail.com>
Date:	Fri, 4 Jun 2010 11:56:59 +0500
From:	Shaz <shazalive@...il.com>
To:	James Morris <jmorris@...ei.org>
Cc:	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	David Safford <safford@...son.ibm.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Arjan van de Ven <arjan@...radead.org>,
	securityengineeringresearchgroup 
	<securityengineeringresearchgroup@...glegroups.com>
Subject: Re: [PATCH 00/14] EVM

On Fri, Jun 4, 2010 at 5:57 AM, James Morris <jmorris@...ei.org> wrote:
> On Tue, 1 Jun 2010, Mimi Zohar wrote:
>
>> SELinux, Smack, Capabilities, and IMA all use extended attributes. The
>> purpose of EVM is to detect offline tampering of these security extended
>> attributes.
>
> One issue mentioned to me off-list is that if EVM is only protecting
> against offline attacks, why not just encrypt the entire volume ?

Are you sure that EVM protects against offline attacks only?

Why and why not encrypt the whole volume?

> This would provide confidentiality and integrity protection for all data
> and metadata, rather than just integrity for xattr metadata.


-- 
Shaz
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