about rfc2393

[Jerome Etienne <[e-mail]>]

quote from rfc2393

"5. Security Considerations

   When IPComp is used in the context of IPSec, it is believed not to
   have an effect on the underlying security functionality provided by
   the IPSec protocol; i.e., the use of compression is not known to
   degrade or alter the nature of the underlying security architecture
   or the encryption technologies used to implement it.
"

but in fact the compression increases the encryption scheme, because
it reduces the redondancy of the plain text which is so usefull for
cryptanalysis.