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From: Babis Chalios <bchalios@amazon.es>
To: "Michael S. Tsirkin" <mst@redhat.com>,
	virtio-comment@lists.oasis-open.org,
	virtio-dev@lists.oasis-open.org, "Cali,
	Marco" <xmarcalx@amazon.co.uk>, "Graf (AWS),
	Alexander" <graf@amazon.de>,
	"Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: amit@kernel.org
Subject: Re: [virtio-dev] Re: [PATCH RFC 0/3] virtio-rng based entropy leak reporting
Date: Mon, 16 Jan 2023 12:39:03 +0100	[thread overview]
Message-ID: <b84afe37-8cbb-ddc0-e5b0-e288743ec16c@amazon.es> (raw)
In-Reply-To: <20230112020204-mutt-send-email-mst@kernel.org>

Hi Michael,

On 12/1/23 08:02, Michael S. Tsirkin wrote:
> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you can confirm the sender and know the content is safe.
>
>
>
> On Mon, Nov 21, 2022 at 11:30:19AM -0500, Michael S. Tsirkin wrote:
>> Generally, entropy only grows. However, there are cases where
>> it goes down - for example, consider generating a one time
>> pad where someone managed to use a side channel to
>> steal its contents. By combining the seemingly random
>> pad with the stolen contents we have reversed the entropy.
>>
>> This actually happens within VMs e.g. when time is reversed due
>> to snapshoting. Existing approaches for VMs include Microsoft's
>> VM GEN ID.
>>
>> This draft proposes a feature in virtio rng for reporting such
>> leaks.
>>
>> Patches 1,2 refactor existing draft text. Patch 3 adds new functionality.
>>
>> TODO:
>>        document theory of operation
>>        add conformance clauses
> Guys any input on this? Anyone going to use this?

I plan to post an RFC patch for linux virtio-rng show-casing this with 
Firecracker, this week.
Also, I had sent an e-mail: 
https://www.mail-archive.com/virtio-dev@lists.oasis-open.org/msg09128.html 
with some questions,
not sure whether you missed it?

>> Michael S. Tsirkin (3):
>>    rng: move to a file of its own
>>    rng: be specific about the virtqueue
>>    rng: leak detection support
>>
>>   content.tex    |  43 +--------------------
>>   virtio-rng.tex | 102 +++++++++++++++++++++++++++++++++++++++++++++++++
>>   2 files changed, 103 insertions(+), 42 deletions(-)
>>   create mode 100644 virtio-rng.tex
>>
>> --
>> MST
>>
>
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> For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org
>

Cheers,
Babis


Amazon Spain Services sociedad limitada unipersonal, Calle Ramirez de Prado 5, 28045 Madrid. Registro Mercantil de Madrid . Tomo 22458 . Folio 102 . Hoja M-401234 . CIF B84570936

  reply	other threads:[~2023-01-16 11:39 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-21 16:30 [virtio-comment] [PATCH RFC 0/3] virtio-rng based entropy leak reporting Michael S. Tsirkin
2022-11-21 16:30 ` [virtio-comment] [PATCH RFC 1/3] rng: move to a file of its own Michael S. Tsirkin
2022-11-21 16:30 ` [virtio-comment] [PATCH RFC 2/3] rng: be specific about the virtqueue Michael S. Tsirkin
2022-11-21 16:30 ` [virtio-dev] [PATCH RFC 3/3] rng: leak detection support Michael S. Tsirkin
2022-11-25 12:41   ` [virtio-dev] " Babis Chalios
2022-12-12 10:10     ` Babis Chalios
2023-01-11 13:57   ` Babis Chalios
2023-08-31 10:16   ` [virtio-dev] " Babis Chalios
2023-09-12 21:05     ` Michael S. Tsirkin
2023-09-12 21:05       ` [virtio-comment] " Michael S. Tsirkin
2023-09-13  9:32       ` Babis Chalios
2023-09-13  9:37         ` Michael S. Tsirkin
2023-09-13  9:37           ` [virtio-comment] " Michael S. Tsirkin
2023-09-13 11:19           ` Babis Chalios
2023-09-18 11:14             ` Babis Chalios
2023-09-18 12:41             ` Michael S. Tsirkin
2023-09-18 12:41               ` [virtio-comment] " Michael S. Tsirkin
2023-09-18 13:00               ` Babis Chalios
2023-09-18 13:58                 ` Michael S. Tsirkin
2023-09-18 13:58                   ` [virtio-comment] " Michael S. Tsirkin
2023-09-18 14:02                   ` Babis Chalios
2023-09-18 14:05                     ` Michael S. Tsirkin
2023-09-18 14:05                       ` [virtio-comment] " Michael S. Tsirkin
2023-09-18 16:30                       ` Babis Chalios
2023-09-19  7:32                         ` Babis Chalios
2023-09-19 10:01                           ` Michael S. Tsirkin
2023-09-19 10:01                             ` [virtio-comment] " Michael S. Tsirkin
2023-09-19 10:11                             ` Babis Chalios
2023-09-22 12:30                               ` Babis Chalios
2023-09-22 15:06                               ` Michael S. Tsirkin
2023-09-22 15:06                                 ` [virtio-comment] " Michael S. Tsirkin
2023-09-22 15:40                                 ` Babis Chalios
2023-09-22 16:01                                   ` Michael S. Tsirkin
2023-09-22 16:01                                     ` [virtio-comment] " Michael S. Tsirkin
2023-09-27 10:43                                     ` Babis Chalios
2023-09-27 21:47                                       ` Michael S. Tsirkin
2023-09-27 21:47                                         ` [virtio-comment] " Michael S. Tsirkin
2023-09-28 18:16                                         ` Babis Chalios
2023-10-13  7:49                                           ` Babis Chalios
2023-10-13 13:38                                             ` Michael S. Tsirkin
2023-10-13 13:38                                               ` [virtio-comment] " Michael S. Tsirkin
2023-11-02 11:20                                           ` Michael S. Tsirkin
2023-11-02 11:20                                             ` [virtio-comment] " Michael S. Tsirkin
2023-11-02 11:38                                             ` Babis Chalios
2023-11-02 11:51                                               ` Michael S. Tsirkin
2023-11-02 11:51                                                 ` [virtio-comment] " Michael S. Tsirkin
2023-11-02 13:42                                                 ` Babis Chalios
2023-11-02 11:25                                   ` Michael S. Tsirkin
2023-11-02 11:25                                     ` [virtio-comment] " Michael S. Tsirkin
2023-11-02 11:51                                     ` Babis Chalios
2023-01-12  7:02 ` [virtio-dev] Re: [PATCH RFC 0/3] virtio-rng based entropy leak reporting Michael S. Tsirkin
2023-01-16 11:39   ` Babis Chalios [this message]
     [not found]     ` <CAHmME9ry2fss2gsbPs2zVJkY=8Cdeae0XFD9FzCVnW67Xy3thA@mail.gmail.com>
2023-01-16 18:11       ` [virtio-comment] " Michael S. Tsirkin

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