SSL vs. SSL over tcp/ip

SSL vs. SSL over tcp/ip

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SSL vs. SSL over tcp/ip Jackie 04-17-2007
Posted by Jackie on April 17, 2007, 3:33 pm
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Hi there,

What's the difference between implementing pure SSL vs. SSL over tcp/
ip? what's the advantage/disadvantage when comparing them?

Can I say that on top of old tcp/ip application, we can add SSL on top
of it for less effort, and for new application we go ahead to use pure
SSL?


Thanks and regards,


Posted by Ertugrul Soeylemez on April 18, 2007, 3:46 am
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> What's the difference between implementing pure SSL vs. SSL over tcp/
> ip? what's the advantage/disadvantage when comparing them?
>
> Can I say that on top of old tcp/ip application, we can add SSL on top
> of it for less effort, and for new application we go ahead to use pure
> SSL?

There is some misconception here. SSL is operating in another layer
than TCP. You can place anything under SSL, be it TCP/IP, UDP/IP or
even something entirely different than IP.


Regards,
Ertugrul S=C3=B6ylemez.


--=20
=46rom the fact that this CGI program has been written in Haskell, it
follows naturally that this CGI program is perfectly secure.

Posted by Volker Birk on April 18, 2007, 1:18 pm
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> You can place anything under SSL, be it TCP/IP, UDP/IP or
> even something entirely different than IP.

That's not completely true. RFC 4346 says in it's introduction already:

| At the lowest level, layered on top of some reliable
| transport protocol (e.g., TCP[TCP]), is the TLS Record Protocol.

This implies, that you cannot use UDP for TLS, because UDP is not
reliable.

Yours,
VB.
--
"Terror eignet sich mehr als irgendeine andere militärische Strategie dazu,
die Bevölkerung zu manipulieren."
(Dr. Daniele Ganser, 2005)
<http://www.auchdieserschwachsinnmussinsinternet.de/>

Posted by Ertugrul Soeylemez on April 20, 2007, 2:36 am
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> > You can place anything under SSL, be it TCP/IP, UDP/IP or even
> > something entirely different than IP.
>
> That's not completely true. RFC 4346 says in it's introduction
> already:
>
> | At the lowest level, layered on top of some reliable transport
> | protocol (e.g., TCP[TCP]), is the TLS Record Protocol.
>
> This implies, that you cannot use UDP for TLS, because UDP is not
> reliable.

Firstly we're talking about SSL, not TLS. Secondly, we have a free
layer 5, where we can make unreliable transport protocols reliable.


Regards,
Ertugrul S=C3=B6ylemez.


--=20
=46rom the fact that this CGI program has been written in Haskell, it
follows naturally that this CGI program is perfectly secure.

Posted by Volker Birk on April 20, 2007, 9:25 pm
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> > This implies, that you cannot use UDP for TLS, because UDP is not
> > reliable.
> Firstly we're talking about SSL, not TLS.

That doesn't matter.

> Secondly, we have a free
> layer 5, where we can make unreliable transport protocols reliable.

You're using a very strange method to agree with me.

Yours,
VB.
--
"Terror eignet sich mehr als irgendeine andere militärische Strategie dazu,
die Bevölkerung zu manipulieren."
(Dr. Daniele Ganser, 2005)
<http://www.auchdieserschwachsinnmussinsinternet.de/>


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