Setup PuTTYgen for ssh key
start
puttygen.exe
The little program looks like this:

Now at first check the "Parameters" at
the bottom of the window
We need at "Type of key to generate"
> SSH-2 RSA enabled
and in the field for "Number of bits in
a generated key" we type "1024"
that looks like this:

## 1. = generate keys
Click the
"Generate" Button - follow the instructions and move your mouse wild
over the blank field in the middle to generate random stuff.

When its done you
looking at such a thing:

Its time
to enter a passphrase and confirm it - its a must otherwise it wont
work ( and keep that passphrase in mind! )
Click on
"Save private key" when you are done.
See:

This will
generate a .ppk file which PuTTY needs later to connect with the phone.
Give it a
file name and save it where you can find it later again. ( In my
example i named it putty_private_key.ppk )
## 2. = copy the file for phone
Ok thats
the tricky part ;)
Go to the
previously ( In part 2 ) copied "dropbear_easy_setup" folder and open
the "key_for_authorization.txt" file with your favourite texteditor.
Now back
to the "PuTTY Key Generator" window
Select
all of the " Public key for pasting into OpenSSH authorized_keys file:"
output and copy it into the opened "key_for_authorization.txt" file.
It starts
with "ssh-rsa" and ends with something like " ....=rsa-key-20...."

The
textfile should now look like this:

Save the
file and copy the whole "dropbear_easy_setup" folder back to its old
place on the sdcard of the phone. Overwrite the old/empty file there.
Then
disconnect the phone from the pc, go back to the sshControl app and
touch the big OK button.
When your Phone is ready make PuTTY run on your Windows pc.