Thank you very much for your answers, Emil. Here are some comments /
На 31.08.11 09:26, email@example.com написа:
Hi. Happy to learn about the work you are doing on jitsi. I would like to make a suggestion: That someone add Jitsiś features to Features and Features2 in en.wikipedia.org/wiki/Comparison_of_instant_messaging_clients - it is missing.
Well I do see it in all the tables on the page you quote. Did you mean another page?
It is in all tables but not in the last two- called Features and
Are all servers essentially the same?
No they are not. I am not sure which differences you are interested in
Privacy mostly I think, like not logging, but it seems not to be a
problem if using the builtin encryptions.
Any recommendation on what XMPP and SIP server to choose, or is there a
place where I can see reliable comparison between servers?
Is it sufficient to use otr and encryption plugins?
Sufficient for what? What encryption plugins?
Sufficient to avoid interception from the server and 3rd parties. From
your answer I believe yes. Aw, no other encryption plugins, not needed I
If I use XMPP to message with a skype
You cannot really use XMPP to chat with a skype user. Skype uses a
proprietary protocol that has nothing to do with XMPP. In the case of
Facebook, they do seem to be using XMPP for the FB2Skype chats but
that's not really an interop scenario.
From recently now it is possible to:
or gtalk or facebook user off-the-record, is it guaranteed to not be recorded by skype or Google or facebook?
There might be some confusion here. What Google call "off the record" is
just the possibility they give you not to keep archives of your
sessions. What we call OTR does stand for the same words (i.e. "Off The
Record") but it is actually a mechanism to encrypt text messages.
As for the difference between the two: Trusting Google's "Off the
record" feature comes down to whether or not you trust Google to keep
their word on that. Technically they still have the possibility to log
your chats without you knowing it.
With OTR it comes down to trusting the encryption mechanisms. If anyone
wants to log your chats with OTR, then they would have to find a way to
I had understood that difference between otr already, so to clarify, my
question was if you use jitsi with jitsi's OTR to talk to another person
using gtalk. Does that work at all? I would say no, because the other
person would have to have OTR-encryption and google does not have this
What about you using a XMPP account in jitsi with jitsi's otr and the
other person using another XMPP client that supports otr natively or
thru plugin (like pidgin I think does) would that work? But I think XMPP
clients normally dont have video encryption, only text.
If I use XMPP video or phone call with a skype I am not aware of a way to do XMPP video calls between XMPP and Skype
I asked this because of this skype new feature of adding XMPP.
or gtalk user can it be intercepted by skype or Google? If you don't use encryption - then yes. If you do have ZRTP active for
your session, then you should be safe.
hm, so it depends if skype added this feature or no, no idea.
If no, is there any way I can communicate with those users, using that protocol, without being logged by third parties? Any particular advantage of SIP over XMPP? (Because XMPP seems to be more popular.)
SIP is widely adopted for telephony services around the whole world.
XMPP is the de-facto standard for instant messaging. Since the
appearance of Jingle, XMPP is also seeing significant adoption for
telephony but it's nowhere near SIP.
Semantically both protocols are quite similar (with a few syntactic
differences) and the actual differences between the two protocols mostly
comes down to the products that support them.
In other words, while in theory you can do the same things with both
protocols, in practice, those that implement SIP tend to have more
telephony oriented features and less IM/Presence related ones. Similarly
XMPP implementations would often come with a great IM/Presence
featureset, but would often lack some of the more advanced
telephony-oriented features that SIP products have.
In the case of Jitsi - we try to keep them leveraged as much as
possible. Still, XMPP does have an edge with the IM part and SIP servers
that Jitsi connects to simply offer more audio/video services that are
not commonly available for XMPP users.
hm, that was my previous impression. Is the text, audio and video
encryption of jitsi the same for both SIP and XMPP, or is SIP safer?
I ask because if encryption is the same, then using just XMPP makes it
simpler, because it has interface with other popular platforms and so
easier to convince more friends to migrate, because I can say hey, you
can talk to skype gtalk and facebook too - even if unencrypted. And when
I talk to those friends jitsi to jitsi, we could both encrypt. And no
need to create an account for XMPP and an account for SIP. I don't know
if this makes sense.
One more question I have is if audio and video encryption also
available for computer-to-phone calls and videocalls, or just
computer-to-computer, both for XMPP and SIP? Does jitsi support this at
all, by the way - paying of course?
If not, any alternatives to skype you could recommend, that uses
encryption computer-to-phone and no risk of logging? (hm, Skype uses
encryption, but their code is closed so skype itself could log and store
stuff I suppose.)