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OpenSSH:
http://www.openssh.org/
OpenSSH (Windows):
http://sshwindows.sourceforge.net/download/
For example, using PuTTYgen, make sure you have a recent version of the
puttygen.exe
(available from
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
). Make
sure you have a recent version of WinSCP (available from
http://winscp.net/eng/download.php
).
To generate a SSH key using PuTTY
http://sourceforge.net/docs/F02/#clients
:
Execute the PUTTYGEN.EXE program
Select the desired key type
SSH2 DSA
(you may use RSA or DSA) within the
Parameters
section
It is important that you leave the passphrase field blank
Click on the
Generate
button
Follow the instruction to move the mouse over the blank area of the program in order to
create random data used by PUTTYGEN to generate secure keys. Key generation will occur
once PUTTYGEN has collected sufficient random data
.