THE IDENTITY OF THINGS - EEMA · @pzfreo#hypworld THE IDENTITY OF THINGS Paul Fremantle Co-Founder,...

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THE IDENTITY OF THINGSPaul FremantleCo-Founder, WSO2Researcherpaul.fremantle@port.ac.uk@pzfreo

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Firstly, does it even matter?

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Three rules for IoT security• 1. Don’t be stupid

• 2. Be smart

• 3. Think about what’s different

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Three rules for IoT security• 1. Don’t be stupid

• The basics of Internet security haven’t gone away• 2. Be smart

• Use the best practice from the Internet• 3. Think about what’s different

• What are the unique challenges of your device?

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http://www.forbes.com/sites/kashmirhill/2013/07/26/smart-homes-hack/

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1998• Realized that session cookies needed to be tied to user

sessions• Scenario: Attacker has a valid login, but changes their cookie• Gets access to another user’s account

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February 2015Mosquitto MQTT Server 1.4 Release Notes• When a durable client reconnects, its queued messages

are now checked against ACLs in case of a change in username/ACL state since it last connected.

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So what is different about IoT?• The longevity of the device

• Updates are harder (or impossible)• The size of the device

• Capabilities are limited – especially around crypto• The fact there is a device

• Usually no UI for entering userids and passwords• The data

• Often highly personal• The mindset

• Appliance manufacturers don’t think like security experts• Embedded systems are often developed by grabbing existing

chips, designs, etc

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Physical Hacks

A Practical Attack on the MIFARE Classic: http://www.cs.ru.nl/~flaviog/publications/Attack.MIFARE.pdfKarsten Nohl and Henryk Plotz. MIFARE, Little Security, Despite Obscurity

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Or try this at home?http://freo.me/1g15BiG

@pzfreo #hypworldhttp://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-630.html

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Sensor Fingerprints

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Ubertooth

http://ubertooth.sourceforge.net/https://www.usenix.org/conference/woot13/workshop-program/presentation/ryan

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Hardware recommendations• Don’t rely on obscurity

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Hardware recommendations• Don’t rely on obscurity• Don’t rely on obscurity• Don’t rely on obscurity• Don’t rely on obscurity• Don’t rely on obscurity• Don’t rely on obscurity• Don’t rely on obscurity

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Hardware Recommendation #2• Unlocking a single device should risk only that device’s

data

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SecurityCharacteristic

Device / Hardware Network Cloud / Server-Side

Confidentiality Hardware attacks Encryption with low capability devices

Privacy concerns

Integrity Spoofing;Lack of attestation

Signatures with low capability devices

As usual

Availability Physical attacks;Radio jamming

Unreliable networks

As normal

Authentication Lack of user input;Hardware retrieval of keys

Challenges of using federated identity

Lack of standards around DeviceIdentity

Access Control Physical access;Lack of local authentication

As usual User managed access controls needed

Non-Repudiation No secure localstorage; Low capability devices

Signatures with low capability devices

As normal

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Problem statement• “Consumers, not companies, own the data collected by Internet of

Things devices.” Limor Fried• Privacy: “Users must be empowered to execute effective controls

over their personal information” Cavoukian

https://www.flickr.com/photos/opensourceway

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PRIVACY BY DESIGN• Proactive not Reactive; Preventative not Remedial• Privacy as the Default Setting• Privacy Embedded into Design• Full Functionality – Positive-Sum, not Zero-Sum• End-to-End Security – Full Lifecycle Protection• Visibility and Transparency – Keep it Open• Respect for User Privacy – Keep it User-Centric

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IDENTITY IS THE NEW PERIMETER

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Identity as a perimeter• Security controls based on identity

• Not location• Not IP address• Not VPN

• However, this raises questions of anonymity and tracking

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Requirements for Identity and Privacy of Things• Federated

• Your choice of provider

• Scalable• Capable of coping with billions of devices

• User Managed• Users get to control what data is shared and with whom

• Secure• Not broken yet!

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Passwords• Passwords suck for humans• They suck even more for devices

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Why Federated Identity for IoT?• Can enable a meaningful consent mechanism for sharing

of device data• Giving a device a token to use on API calls better than

giving it a password• Revokable• Granular

• May be relevant for both• Device to cloud• Cloud to app

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Dynamic Client Registration• Solves the problem of “Breaking one device breaks them

all”• A RESTful API (part of OpenID Connect)• Allows a manufacturing process to get fresh credentials

for each device• https://openid.net/specs/openid-connect-registration-

1_0.html

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More information

https://www.researchgate.net/publication/264347555_Federated_Identity_and_Access_Management_for_the_Inernet_of_Things

https://www.researchgate.net/publication/274897865_Web_API_Management_Meets_the_Internet_of_Things

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Why really?

Your IoT data privacy should not rely on the maker of a specific device

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Uber, the taxi-ordering app, can use more sophisticated technology to track people than the police, according to Britain’s top officer.

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Uber admitted employees abused God View

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What is the value of connection?

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The current situation

Majority of IoT networks today

Private API

Device

Web systems:Ecosystems, On-demand signup,rich set of clients

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Hyperconnected• My definition

• When each device is potentially linked to every other device

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De-anonymization

@pzfreo #hypworldhttps://firstlook.org/theintercept/2015/07/01/nsas-google-worlds-private-communications/

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Are you creating the next privacy breach?

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The IoT Dog Collar - Whistle

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https://www.flickr.com/photos/themacinator/On the Internet of Things,

no-one knows you are a dog-collar.

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Thank you!

https://www.flickr.com/photos/nateone