From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org, monty.wiseman@ge.com,
Monty Wiseman <montywiseman32@gmail.com>,
Matthew Garrett <mjg59@google.com>
Subject: Re: Documenting the proposal for TPM 2.0 security in the face of bus interposer attacks
Date: Wed, 21 Nov 2018 01:12:22 +0200 [thread overview]
Message-ID: <20181120231222.GH8391@linux.intel.com> (raw)
In-Reply-To: <1542734581.2814.28.camel@HansenPartnership.com>
On Tue, Nov 20, 2018 at 09:23:01AM -0800, James Bottomley wrote:
> On Tue, 2018-11-20 at 13:10 +0200, Jarkko Sakkinen wrote:
> [...]
> > This is basically rewrite of TPM genie paper with extras. just
> > shorten it to include the proposed architecture and point to the TPM
> > Genie paper (which is not in the references at all ATM).
>
> I really don't think so. The paper only gives details of bound
> authorization sessions for TPM 2.0 which suffer from no to weak entropy
> problems. The reason for using salted ones in the document, which
> aren't mentioned at all in the genie paper, is so we have a high
> entropy cryptographically unguessable HMAC and encryption key.
Point taken.
I will re-read the paper with care as soon as I have time and give
better feedback.
> Only if you have some type of security seal, which most laptops don't
> have.
Agreed went over the top on this one.
/Jarkko
next prev parent reply other threads:[~2018-11-20 23:12 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-19 17:34 Documenting the proposal for TPM 2.0 security in the face of bus interposer attacks James Bottomley
2018-11-19 20:05 ` Jason Gunthorpe
2018-11-19 20:20 ` James Bottomley
2018-11-19 21:19 ` Jason Gunthorpe
2018-11-19 21:34 ` James Bottomley
2018-11-19 21:44 ` Jason Gunthorpe
2018-11-19 22:36 ` James Bottomley
2018-11-19 23:08 ` Jason Gunthorpe
2018-11-20 0:54 ` James Bottomley
2018-11-20 3:05 ` Jason Gunthorpe
2018-11-20 17:17 ` James Bottomley
2018-11-20 21:33 ` Jason Gunthorpe
2018-11-20 22:34 ` James Bottomley
2018-11-20 23:39 ` Jason Gunthorpe
2018-11-21 2:24 ` EXTERNAL: " Jeremy Boone
2018-11-21 5:16 ` Jason Gunthorpe
2018-11-20 23:52 ` Jarkko Sakkinen
2018-11-20 23:41 ` Jarkko Sakkinen
2018-11-20 11:10 ` Jarkko Sakkinen
2018-11-20 12:41 ` Jarkko Sakkinen
2018-11-20 17:25 ` James Bottomley
2018-11-20 23:13 ` Jarkko Sakkinen
2018-11-20 23:58 ` James Bottomley
2018-11-21 0:33 ` EXTERNAL: " Jeremy Boone
2018-11-21 6:37 ` Jarkko Sakkinen
2018-11-21 5:42 ` Jason Gunthorpe
2018-11-21 7:18 ` Jarkko Sakkinen
[not found] ` <F10185EF-C618-45DC-B1F3-0053B8FE417F@gmail.com>
2018-11-21 9:07 ` Jarkko Sakkinen
2018-11-21 9:14 ` Jarkko Sakkinen
2018-11-20 17:23 ` James Bottomley
2018-11-20 23:12 ` Jarkko Sakkinen [this message]
2018-12-10 16:33 ` Ken Goldman
2018-12-10 17:30 ` James Bottomley
2018-12-11 21:47 ` Ken Goldman
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