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Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens.

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Presentation on theme: "Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens."— Presentation transcript:

1 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013Presenter’s NameDate The Phone Meets the Web. IETF and W3C Standards for Real Time Communications in Browsers. RTCWEB / WEBRTC Andrew Hutton – Head of Standardization at Siemens Enterprise Communications.

2 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 Contents  Standardization - IETF & W3C  RTCWEB / WEBRTC.  Why, Who, What.  Disruptive?  Use Cases and Requirements.  Solution Overview.  Architecture  Security  Identity, Consent, Firewalls.  Implementation Status.. 2

3 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 Standardization – Internet Engineering Task Force (IETF)  The mission of the IETF is to make the Internet work better by producing high quality, relevant technical documents that influence the way people design, use, and manage the Internet.  An Open Standards organisations based on consensus and openness.  One of the "founding beliefs" is embodied in a quote from David Clark: "We reject kings, presidents and voting. We believe in rough consensus and running code".  Another quote that has become a commonly-held belief in the IETF comes from Jon Postel: "Be conservative in what you send and liberal in what you accept". – Its all about interoperability.  115 Active Working Groups – Probably something you are interested in?  RFC / Protocol Factory  HTTP – RFC 2616  TCP – RFC 675  SIP – RFC 3261 IETF Video - 3

4 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 Standardization – World Wide Web Consortium (W3C)  The World Wide Web Consortium (W3C) is an international community that develops open standards to ensure the long-term growth of the Web. An Open Standards organisations based on consensus and openness.  Principles.  Web for All (Accessibility, Internationalization etc.)  Web on Everything (Mobile Web Etc.)  Web of Rich Interaction (Communications, Social Networking Etc.)  Web of Data and Services (Semantic Web Etc.)  Web of Trust (Security and Privacy).  HTML5, CSS, XML, Web Services,  Browser API’s, Device API’s. 4

5 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 IETF / W3C Participation.  Anyone can participate in Open Standards Development.  All IETF work is done in public using public mailing lists and meetings.  Most W3C work uses public mailing lists but not all.  However be careful.  Both IETF and W3C have strict IPR Policies and your employer might not be happy if you give away your company IPR.  You need to understand IPR issues before you make any contribution (Even an to the working group mailing list). 5

6 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 RTCWEB / WEBRTC Who, What and Why.  Initiated by Google in late 2010 who organised meeting of IETF & W3C members.  Proposed to initiate standardization project with the aim of enabling real- time media transport (Voice, Video and Data) between browsers.  Real-Time Communication was previously only possibly in Web Applications using Plug-ins which have many issues.  Agreed to split the work between IETF & W3C (There is a large overlap in people and companies anyway).  Now probably largest working group in IETF and many participants / contributors. 6 Interactive Voice, Video and Data in a Browser.

7 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 WEBRTC – Disruptive ?  Makes every browser in to a potential VoIP Soft client.  No Plugin’s, no downloads.  GUI is web based.  Security controls are built-in to the browser.  Audio/Video codec’s built-in to the browser and royalty-free (Hopefully).  Standard API for the millions of web application and games developers to work with.  Does not require any real-time VoIP knowledge it just works. 7

8 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 RTCWEB / WEBRTC Standards  IETF RTCWEB (Real-Time Communications For WEB Browsers)  Defines requirements, architecture, security model, and protocols, for peer to peer communication (Audio, Video, Data) between browsers.  Has to be standardized to enable interoperability between browser vendors.  Too many internet drafts to mention 78 at last count but only a few will become RFC’s.  W3C WEBRTC (Web Real-Time Communications).  Specifies browser API’s.  Has to be standardized so that application developers have a common API to work with.  Three specifications (PeerConnection, getUserMedia, mediaStreamCapture). 8

9 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 WEBRTC – Use Cases and Requirements.  Basic Voice / Video Communications.  Multiparty Voice/Video.  FedEx calling – PSTN/Legacy Interworking requirements.  Enterprise NAT/FW Scenarios.  Multiparty on-line gaming.  Data channel requirements.  Security Considerations.  There are lots – Consent (Receive Media, Device/Camera Access etc.) 9

10 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 RTCWEB Architecture - Trapezoid & Identity Signaling over HTTPS/WebSockets (JSEP/ROAP, SIP*) Browser Servers example.com Servers example.com JavaScript/HTML/CSS Servers example.net Servers example.net Browser JavaScript/HTML/CSS Inter-domain Communication Media DTLS-SRTP Out of Scope* Signaling over HTTPS/WebSockets (JSEP/ROAP, SIP*) Connectivity (STUN/ICE) Identity Provider Get Assertion Verify Assertion Slide 10 * Browser to Web Server and Inter-domain signalling is out of scope but has strong influence on browser API.

11 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 Identity – How do you know who you are talking to? Slide 11 WEBRTC WEBSITE Identity Provider Secure Media over DTLS/SRTP 1.Alice log’s on to her identity provider. 2.Before calling Bob Alice’s Browser gets identity token assertion from the provider. 3.Identity assertion is passed to Bob’s browser during call establishment. 4.Bob’s browser asks the identity provider to verify the assertion. 5.The identity assertion and the DTLS fingerprint are checked and the user is given the green light to indicate that the remote party is trusted (by the identity provider) and there is no man in the middle. AliceBob

12 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 Consent – How do we prevent media hammer attacks. Slide 12 Audio, Video, Data Alice Audio, Video, Data Alice HTML5 / JavaScript Bob Target

13 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 Consent – How do we prevent media hammer attacks. Slide 13 Alice HTML5 / JavaScript Bob ICE/STUN – Ok to talk? ICE/STUN – Yes ok to talk Audio, Video, Data ICE/STUN – Still Ok to talk? ICE/STUN – Yes ok to talk HTML5 / JavaScript ICE Credentials passed via the service provider.

14 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 NAT’s and Firewall – Connectivity Problems. Slide 14 Alice Bob ICE – RFC 5245 – Is the answer. 1.ICE – Interactive Connectivity Establishment 2.Provides a means of finding the best path between Alice and Bob. 3.Provides means to create NAT binding and obtain server reflexive address (STUN). 4.Provides a means to insert relays if necessary (TURN) – Symmetric NAT’s. 5.Alice gathers all possible address candidates and asks remote party to connectivity check them until best candidates are chosen. 6.Also provides means for consent. STUN Server TURN Server

15 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 Browser Implementation Status – Not Finished Yet.  Google - Chrome  The leaders and following the standards as close as possible.  Available in Chrome stable and Chrome canary.  - Some confusion regarding Google project name.  Mozilla – Firefox  Available in Firefox nightly build.  Recently demonstrated interoperability with Chrome.  Apple – Safari  Who knows?  Microsoft – Internet Explorer.  Implemented getUserMedia API,  Active contributor to standards bodies (Microsoft/Skype).  However has an alternative API proposal (CU-RTC-WEB)CU-RTC-WEB  Others with implementations.  Opera, Ericsson Browser (Mobile). 15

16 Andrew Hutton© 2013 Siemens Enterprise Communications GmbH & Co. KG. Siemens Enterprise Communications GmbH & Co. KG is a Trademark Licensee of Siemens AG. February 2013 Thank you for your attention! Andrew Hutton Siemens Enterprise Communications Ltd. 16


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