1. Submission doc.: IEEE 802.11-15/1128r1 September 2015 Dan Harkins, Aruba Networks (an HP company)Slide 1 Opportunistic Wireless Encryption Date: 2015-09-13 Authors:

2. Submission doc.: IEEE 802.11-15/1128r1 September 2015 Dan Harkins, Aruba Networks (an HP company)Slide 2 Abstract This submission presents an idea for addressing a problem with public wi-fi hotspots

3. Submission doc.: IEEE 802.11-15/1128r1September 2015 Dan Harkins, Aruba Networks (an HP company) Slide 3 The Situation Wireless Internet access as an entitlement– “oh, no wi-fi, let’s go somewhere else” Coffee shop, bar, or restaurant wants to offer patrons “free wi-fi” – They want to provide a service but don’t want it to be a pain to configure or use – They want to provide some notion of both service and security to customers

4. Submission doc.: IEEE 802.11-15/1128r1September 2015 Dan Harkins, Aruba Networks (an HP company) Slide 4 The Problem Perpetual battle: Security vs Ease-of-Use – They want it to be easy-to-use Don’t bug the staff too much– “no I said the L is capital” Don’t irritate the customer– “wait, what? say that again” Don’t require specialized knowledge– “what’s an ‘EAP method’?”, “How do I know what my ‘anonymous identity’ is?”, “Which of these 400 certificates do I need to select?” – They want some notion of security Want it to be better-than-nothing security Don’t want to have to get/generate/install a certificate Secure access by patrons has to scale (see easy-to-use) Result: Both sides lose

5. FAIL September 2015 Dan Harkins, Aruba Networks (an HP company) 5

6. Submission doc.: IEEE 802.11-15/1128r1 The Solution? OWE Make it simple to provision– just switch it on Make it virtually impossible to misconfigure– no user entry required Make public wi-fi “suck less” than it does when using a shared PSK Raise the bar that is necessary to perform pervasive monitoring just a bit higher OWE is an outgrowth of an IETF BOF on improving the captive portal experience Slide 6Dan Harkins, Aruba Networks (an HP company) September 2015

7. Submission doc.: IEEE 802.11-15/1128r1 IETF Proposal https://tools.ietf.org/html/draft-wkumari-owe-00 – Network appears “open” to the user (no “lock icon”) – Uses a Vendor Specific Element in beacons and probe responses to indicate OWE – After association in an OWE network, STA and AP do PSK authentication using the SSID as the password Upside – No need to explain/enter anything, just works – Code changes AP side are trivial; STA side, manageable Downside – Inherits all the security problems of shared PSK – Publicly advertises the PSK so arguably worse! Slide 7Dan Harkins, Aruba Networks (an HP company) September 2015

8. Submission doc.: IEEE 802.11-15/1128r1 My Proposal Don’t do it in the IETF, let’s do it here AP advertises an OWE AKM When associating to an SSID with OWE include Diffie-Hellman exponentials in (Re)Associate Request and Response STA and AP perform Diffie-Hellman, use shared secret to derive a PMK Use this (truly pairwise) PMK with 4-way HS Slide 8Dan Harkins, Aruba Networks (an HP company) September 2015

9. Submission doc.: IEEE 802.11-15/1128r1 Benefits More secure than a shared PSK – Not susceptible to passive attack – All those tools downloadable from Internet to crack PSKs won’t work! Easier to set-up than PSK – Nothing to provision or describe, no user error Easier to use by customers – Absolutely nothing needed to do! It just works. Makes pervasive monitoring that much harder Easier to use plus better security! Winner, winner! Slide 9Dan Harkins, Aruba Networks (an HP company) September 2015

10. Submission doc.: IEEE 802.11-15/1128r1 ุ Slide 10Dan Harkins, Aruba Networks (an HP company) September 2015 ขอขอบคณ Thank You!

11. Submission doc.: IEEE 802.11-15/1128r1 Slide 11Dan Harkins, Aruba Networks (an HP company) September 2015 Questions?

12. Submission doc.: IEEE 802.11-15/1128r1 OWE Straw Poll Option 1: Good idea, we should do it! Option 2: Bad idea, let the IETF do it! Option 3: I was reading my email and not paying attention, sorry. Slide 12Dan Harkins, Aruba Networks (an HP company) September 2015