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Re: compression before encryption



I believe the point is that "it is believed not to have [a negative]
effect on the underlying security functionality...."

-derek

Jerome Etienne <jerome@psti.com> writes:

> 
> apparently the ippcp list is closed, so i try here...
> 
> quote from IP Payload Compression Protocol (IPComp) (RFC 2393) 
> 
> "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.
> did i miss something ?
> 

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord@MIT.EDU                        PGP key available


References: