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RE: Notes on W3C WoT Security Use Cases

From: Mccool, Michael <michael.mccool@intel.com>
Date: Wed, 12 Jul 2017 12:40:45 +0000
To: Soumya Kanti Datta <Soumya-Kanti.Datta@eurecom.fr>, "Reshetova, Elena" <elena.reshetova@intel.com>
CC: "public-wot-wg@w3.org" <public-wot-wg@w3.org>, "public-wot-ig@w3.org" <public-wot-ig@w3.org>
Message-ID: <94B1DC03AB76B54E8C86625B98F8506A2FD95391@PGSMSX108.gar.corp.intel.com>

The other thought that came into my mind when Soumya and I were talking is that we can do a categorization by "technologies".   For instance, there is a difference in security possible between "Local" networking (Bluetooth, Zigbee, etc) and "Global" networking (TCP, HTTP, etc).   Think of this as another "axis" along which we can characterize the problem and scenarios.


-----Original Message-----
From: Soumya Kanti Datta [mailto:Soumya-Kanti.Datta@eurecom.fr] 
Sent: Wednesday, July 12, 2017 14:37
To: Reshetova, Elena <elena.reshetova@intel.com>; Mccool, Michael <michael.mccool@intel.com>
Cc: public-wot-wg@w3.org; public-wot-ig@w3.org
Subject: Re: Notes on W3C WoT Security Use Cases

Hi Elena,

I think privacy is the main aspect here. There can be other factors like control over the private data - one may want to share one's body temp with doctor in case of fever. For emergency or law enforcement situations, much more data need to be shared.

I am not sure if the security tasks are taking care of access control or it is in the scope.

Best regards,


Research Engineer, EURECOM, France | +33658194342 | @skdatta2010 | http://iot.eurecom.fr | Skype id: soumyakantidatta

On 12-07-2017 17:27, Reshetova, Elena wrote:
> Hi Soumya,
> Thank you very much for your use case!
> I guess the main differentiating property of this use case would be privacy (since data in wearables are coming from individuals). Could you think of more differentiating factors in this use case?
> Best Regards,
> Elena.
>> -----Original Message-----
>> From: Soumya Kanti Datta [mailto:Soumya-Kanti.Datta@eurecom.fr]
>> Sent: Wednesday, July 12, 2017 12:22 PM
>> To: Mccool, Michael <michael.mccool@intel.com>; Reshetova, Elena 
>> <elena.reshetova@intel.com>
>> Cc: public-wot-wg@w3.org; public-wot-ig@w3.org
>> Subject: Re: Notes on W3C WoT Security Use Cases
>> Hello All,
>> One more use case from my side. I did a study with some students on 
>> wearable devices. We found that most of them do not use "https" or 
>> encrypt the data they are sending to a cloud. I think we can extend 
>> our scope to cover fitness trackers/wearables as well.
>> I will join the Security TF in the WG from now on.
>> Thanks,
>> Soumya
>> Research Engineer, EURECOM, France | +33658194342 | @skdatta2010 | 
>> http://iot.eurecom.fr | Skype id: soumyakantidatta
>> On 12-07-2017 13:45, Mccool, Michael wrote:
>>> Notes from security use cases discussion today in the F2F.
>>> (These are cc'd to the public WoT IG/WG lists so be careful with reply-to-all).
>>> Have come up with some things in our threat model.. but are missing 
>>> more
>> specific use cases.   Want to find scenarios that are different from the security
>> viewpoint.
>>> First thing we tried to define was the "home" use case (see link).
>>> https://github.com/ereshetova/wot/blob/master/security-

>> privacy/SecurityScenarios.md
>>> Wand to add additional scenarios to this document... have moved the 
>>> scenarios
>> out of the threat model into a separate document.
>>> For home scenario, privacy is important, for instance; it may be 
>>> more or less
>> important in other scenarios (eg more in medical, less in industrial, etc).
>>> Don't really need details, just an idea of which environments are important.
>>> Why?  To be able to define levels of security for implementation.  
>>> Different
>> standards apply to different use cases, and also interoperability may 
>> or may not be desirable between different ecosystems if they have 
>> different security and privacy standards they need to satisfy.  
>> Cross-domain information exchange permitted and when?
>>> Question from google: do we consider security and privacy together, 
>>> or
>> separately?
>>> Response: together for this discussion, but separately later.  Also, 
>>> use cases
>> important for more than security.
>>> Privacy: only relevant if there are people involved.  People have classes:
>> employees, citizens, police, nurse/doctor, owner, etc.
>>> Issue: indirect information about people possible, eg. heat systems 
>>> -> people
>> home or not.   Also issue of tying data about people to a particular person, vs
>> aggregate or anonymized information.
>>> What are other good differentiating feature:
>>> Critical infrastructure (failure -> safety  or physical security issue issue).    Level
>> of impact.
>>> Cost (failure -> equipment damage).
>>> Confidentiality (failure -> leakage of sensitive information, which 
>>> could be
>> personal, corporate, or municipal, or governmental (eg national 
>> security))
>>> TODO: look at existing standards and frameworks, such as the IIC, to 
>>> find
>> additional differentiating features
>>> Might be able to manage with semantic classes using differentiating factors.
>> For example, could restrict data to devices with an appropriate level of security.
>>> Additional Use Cases:
>>> Medical: Medical devices communicating with hospital IT system and
>> monitoring patients.  This means they carry personal patient data and 
>> will be subject to privacy legislation.  Critical, people  => High 
>> security and privacy requirements.
>>> Industrial Automation: Industrial use cases not directly monitoring 
>>> people, eg a
>> fully automated factory.  Cost => security requirement.
>>> Corporate Employee Monitoring /{Office, Manufacturing}: Corporate 
>>> use cases
>> including monitoring of people, which might be office or industrial 
>> (eg manufacturing).
>>> Smart Cities/Building/Campus: Municipal system monitoring, including
>> monitoring of both infrastructure and people (both citizens and employees).
>> Failures may have both privacy and safety implications.  Law and order.
>> Emergency services (Fire and EMG).
>>> Mobile: personal devices (including voice recog access points) 
>>> communicating
>> with IoT devices.
>>> Scripting API, post-data-consuming vs exposed side.  How does 
>>> security look
>> from the consumer viewpoint?  From the exposed data viewpoint?   Consumer is
>> the data user; exposer is data provider.  But need to consider flow of both data
>> and commands; latter can cause a safety issue, for instance.   To further consider
>> direction of flow of data and threats, who is attacker, etc.
>>> Could be an issue, for instance, with an exposed thing producing 
>>> false data (eg
>> a security sensor) that influences a system consuming that data, 
>> causing a physical security risk.
>>> -----Original Message-----
>>> From: Reshetova, Elena
>>> Sent: Wednesday, July 12, 2017 08:29
>>> To: Mccool, Michael <michael.mccool@intel.com>
>>> Subject: Link to the security use cases doc
>>> Michael,
>>> Here is the link to the security scenarios/use cases doc:
>> https://github.com/ereshetova/wot/blob/master/security-

>> privacy/SecurityScenarios.md
>>> It has the home scenario now moved from threat document, as well as
>> tentative placeholders for two more use cases, but let's see how the 
>> discussion goes today.
>>> Best Regards,
>>> Elena

Received on Wednesday, 12 July 2017 12:41:19 UTC

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