Oliver,

compression is in the draft.
but, as Holger says, its kind of vague in how it is to be implemented
in practice, compression doesn't seem to produce enough benefits, when
used with streaming encryption, to make its use worthwhile.

I'll point you, and the others on the list, to a presentation Eric Young
gave at RSA'99
where he touched on the topic (pages 43-45 of the pdf presentation).

Basically from Eric's figures, he concluded that compression is best
left to the application
that knows something about the data, and can choose the best compression
techniques for the specific type of data being carried over the SSL
pipe.

the presentation also has some good figures on cipher overheads in
SSL/TLS.

http://www.aus.rsa.com/rsa99/ssl-tls.pdf

Regards

/Neil Costigan

Celo Communications






Oliver Floericke wrote:
> 
> Hi there,
> 
> does OpenSSL support data compression as mentioned in the Netscape draft?
> Does anybody know if this feature is supported by other SSL
> implementations??
> 
> Thank you,
> 
> Oliver
> 
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