Re: [rtcweb] AVPF [was: Encryption mandate (and offer/answer)]
Roman Shpount <roman@telurix.com> Sat, 10 September 2011 18:50 UTC
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Date: Sat, 10 Sep 2011 14:52:19 -0400
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From: Roman Shpount <roman@telurix.com>
To: Matthew Kaufman <matthew.kaufman@skype.net>
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Cc: Randell Jesup <randell-ietf@jesup.org>, Jonathan Lennox <jonathan@vidyo.com>, "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] AVPF [was: Encryption mandate (and offer/answer)]
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Yes, I did simplify things quite a bit in regard to *RTP-over-DTLS*, but the main point was that SRTP is not the only or the most secure media transport out there. As far as ICE is concerned, it is backwards compatible with non-ICE end points. The worst you can end up with (and this is not mandated, but just the recommended procedure for selecting the default flow in the standard) is going through a TURN server (if one is available) every time you are talking to a non-ICE end point. If in the API we provide a way to specify STUN/TURN servers used for media, we can effectively turn ICE off for some calls. On the related note, I do think that specifying and providing STUN and TURN servers should be responsibility of the RTC application developer and not the browser configuration. TURN server can consume quite a bit of bandwidth and one can see that they will be provided as a paid service in combination with RTC application itself. _____________ Roman Shpount On Sat, Sep 10, 2011 at 12:22 PM, Matthew Kaufman <matthew.kaufman@skype.net > wrote: > On 9/10/2011 4:47 AM, Roman Shpount wrote: > >> SRTP is a simple media encryption using signaling channel exchanged keys >> and salt to do simple counter mode AES with content signing using HMAC-SHA1. >> It also implements a dictionary based replay protection. DTLS offers wider >> encryption and content signing algorithm selection, end-point handshake >> based on certificates, certificate validation using certificate authority. >> In general, DTLS offers same protection that TLS does, while SRTP is >> simplified and optimized for media. >> > > I think you left out a description of DTLS-SRTP and made other > simplifications. > > > >> In regard to the overall discussion, if we want interop with existing VoIP >> infrastructure, we need to support RTP with AVP. 99% of all SIP deployments >> do not support and cannot support SRTP. >> > > They also cannot complete the ICE STUN handshake that is required to prove > to the browser that they are willing to accept media. > > > None of the wholesale VoIP telephony carriers support SRTP (some offer VPN >> or direct interconnects if you care about privacy). >> > > Likewise regarding ICE. > > > Consumer VoIP companies (like Vonage or Comcast) do not support or use >> SRTP for any calls from their customer equipment. >> > > And again regarding ICE. > > > In places were encryption is supported (like Skype) it is often either >> something different from SRTP. In order to connect to all those environments >> without media proxy we need plain RTP. >> > > Even if we need plain RTP, that isn't an argument for SDES-keyed SRTP. > > Matthew Kaufman > >
- [rtcweb] Remote recording - RTC-Web client acting… Elwell, John
- Re: [rtcweb] Remote recording - RTC-Web client ac… Stefan Håkansson LK
- Re: [rtcweb] Remote recording - RTC-Web client ac… Ravindran Parthasarathi
- Re: [rtcweb] Remote recording - RTC-Web client ac… Paul Kyzivat
- Re: [rtcweb] Remote recording - RTC-Web client ac… Dan York
- Re: [rtcweb] Remote recording - RTC-Web client ac… Elwell, John
- Re: [rtcweb] Remote recording - RTC-Web client ac… Olle E Johansson
- Re: [rtcweb] Remote recording - RTC-Web client ac… Dan York
- Re: [rtcweb] Remote recording - RTC-Web client ac… Hutton, Andrew
- Re: [rtcweb] Remote recording - RTC-Web client ac… Igor Faynberg
- [rtcweb] SIP MUST NOT be used in browser?[was RE:… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] Remote recording - RTC-Web client ac… Randell Jesup
- Re: [rtcweb] Remote recording - RTC-Web client ac… Elwell, John
- Re: [rtcweb] Remote recording - RTC-Web client ac… Hutton, Andrew
- Re: [rtcweb] Remote recording - RTC-Web client ac… Harald Alvestrand
- Re: [rtcweb] Remote recording - RTC-Web client ac… Dzonatas Sol
- Re: [rtcweb] Remote recording - RTC-Web client ac… Igor Faynberg
- Re: [rtcweb] Remote recording - RTC-Web client ac… Paul Kyzivat
- Re: [rtcweb] Remote recording - RTC-Web client ac… Harald Alvestrand
- Re: [rtcweb] Remote recording - RTC-Web client ac… Elwell, John
- Re: [rtcweb] Remote recording - RTC-Web client ac… Matthew Kaufman
- Re: [rtcweb] Remote recording - RTC-Web client ac… Dzonatas Sol
- Re: [rtcweb] Remote recording - RTC-Web client ac… Ravindran Parthasarathi
- Re: [rtcweb] Remote recording - RTC-Web client ac… Timothy B. Terriberry
- Re: [rtcweb] Remote recording - RTC-Web client ac… Ravindran Parthasarathi
- Re: [rtcweb] Remote recording - RTC-Web client ac… Ravindran Parthasarathi
- Re: [rtcweb] Remote recording - RTC-Web client ac… Matthew Kaufman
- Re: [rtcweb] Remote recording - RTC-Web client ac… Matthew Kaufman
- Re: [rtcweb] Remote recording - RTC-Web client ac… Bernard Aboba
- Re: [rtcweb] Remote recording - RTC-Web client ac… Robert O'Callahan
- Re: [rtcweb] Remote recording - RTC-Web client ac… Robert O'Callahan
- Re: [rtcweb] Remote recording - RTC-Web client ac… Elwell, John
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Matthew Kaufman
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Matthew Kaufman
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Olle E. Johansson
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Asveren, Tolga
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Justin Uberti
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Matthew Kaufman
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Matthew Kaufman
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Matthew Kaufman
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Matthew Kaufman
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Paul Kyzivat
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Olle E. Johansson
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Roman Shpount
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Harald Alvestrand
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Markus.Isomaki
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Randell Jesup
- [rtcweb] Encryption mandate Randell Jesup
- Re: [rtcweb] Encryption mandate Olle E. Johansson
- Re: [rtcweb] Encryption mandate Dzonatas Sol
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Olle E. Johansson
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Olle E. Johansson
- Re: [rtcweb] Encryption mandate Dzonatas Sol
- Re: [rtcweb] Encryption mandate (and offer/answer) Jonathan Lennox
- Re: [rtcweb] Encryption mandate Christopher Blizzard
- Re: [rtcweb] Encryption mandate Igor Faynberg
- Re: [rtcweb] Encryption mandate Dzonatas Sol
- Re: [rtcweb] Encryption mandate Paul Kyzivat
- Re: [rtcweb] Encryption mandate Igor Faynberg
- Re: [rtcweb] Encryption mandate Randell Jesup
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Matthew Kaufman
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Matthew Kaufman
- Re: [rtcweb] Encryption mandate (and offer/answer) Randell Jesup
- Re: [rtcweb] Encryption mandate Matthew Kaufman
- Re: [rtcweb] Encryption mandate Randell Jesup
- Re: [rtcweb] Encryption mandate Dzonatas Sol
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Silvia Pfeiffer
- Re: [rtcweb] Encryption mandate Christopher Blizzard
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] Encryption mandate Olle E. Johansson
- Re: [rtcweb] Encryption mandate Olle E. Johansson
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Olle E. Johansson
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Silvia Pfeiffer
- Re: [rtcweb] Encryption mandate Randell Jesup
- [rtcweb] AVPF [was: Encryption mandate (and offer… Christer Holmberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Harald Alvestrand
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Olle E. Johansson
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Silvia Pfeiffer
- Re: [rtcweb] Encryption mandate Michael Procter
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Tim Panton
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Olle E. Johansson
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Jonathan Lennox
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Tim Panton
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- [rtcweb] Meeting Bridge and Webex link for Sept 8… Sohel Khan
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Harald Alvestrand
- Re: [rtcweb] Encryption mandate Paul Kyzivat
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Bernard Aboba
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Harald Alvestrand
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Roman Shpount
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Roman Shpount
- Re: [rtcweb] Encryption mandate Paul Kyzivat
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Paul Kyzivat
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] Encryption mandate Christopher Blizzard
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Justin Uberti
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Peter Saint-Andre
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Igor Faynberg
- Re: [rtcweb] SIP MUST NOT be used in browser? Aaron Clauson
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Justin Uberti
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Alan Johnston
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Justin Uberti
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Matthew Kaufman
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Eric Rescorla
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Justin Uberti
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Alan Johnston
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Roman Shpount
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Christer Holmberg
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Christer Holmberg
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Randell Jesup
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Justin Uberti
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Paul Kyzivat
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Olle E. Johansson
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Olle E. Johansson
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Olle E. Johansson
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Roman Shpount
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Matthew Kaufman
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Roman Shpount
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Matthew Kaufman
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Bernard Aboba
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Christer Holmberg
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Paul Kyzivat
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Randell Jesup
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Stefan Håkansson LK
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Hadriel Kaplan
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Timothy B. Terriberry
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dzonatas Sol
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser? Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Roman Shpount
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Roman Shpount
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Roman Shpount
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Stefan Håkansson LK
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Stefan Håkansson LK
- [rtcweb] SIP vs Websocket in RTCWeb [was RE: SIP … Ravindran Parthasarathi
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Matthew Kaufman
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Matthew Kaufman
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… DRAGE, Keith (Keith)
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Muthu Arul Mozhi Perumal (mperumal)
- Re: [rtcweb] SIP vs Websocket in RTCWeb [was RE: … Peter Saint-Andre
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Paul Kyzivat
- Re: [rtcweb] SIP vs Websocket in RTCWeb [was RE: … Dzonatas Sol
- Re: [rtcweb] SIP vs Websocket in RTCWeb [was RE: … Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Jozsef Vass
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Roman Shpount
- Re: [rtcweb] SIP vs Websocket in RTCWeb [was RE: … Peter Saint-Andre
- [rtcweb] signaling protocol SHANMUGALINGAM SIVASOTHY
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Hadriel Kaplan
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Hadriel Kaplan
- Re: [rtcweb] SIP MUST NOT be used in browser? Tim Panton
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Tim Panton
- Re: [rtcweb] SIP MUST NOT be used in browser? Olle E. Johansson
- Re: [rtcweb] SIP MUST NOT be used in browser? Ravindran Parthasarathi
- Re: [rtcweb] SIP MUST NOT be used in browser?[was… Muthu Arul Mozhi Perumal (mperumal)
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dan Wing
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Tim Panton
- Re: [rtcweb] AVPF [was: Encryption mandate (and o… Dan Wing