"cipher none" alternatives ?

[Dan Kaminsky]

> "scp -c none with RSA authentication"
>
> does not protect the integrity of the data you transfer.

Markus--

    Say I did something like(yes, I know this wouldn't work out of the box):

    ssh -2 -oCiphers none -oMACs hmac-md5 user at host tar czf - bigdir/ | tar
xzvf -

    Would this maintain packet integrity while maximizing transmission
speed?

    Is there any argument for supporting arcfour in SSH2 but *not* SSH1?

--Dan