Hi Vincent, Thank you for your reply.
Search "putty generate key" and you will find some site like : > > http://kb.siteground.com/article/How_to_generate_an_SSH_key_on_Windows_using_PuTTY.html > . > > And generate a key in the supported format by your server. > Yes, I had tired this, I have just tried another time, but in jenkins job console, I have this error : JSchException: invalid privatekey I think that this method is to generate a key on a server, and I think that in Jenkins, I have to indicate a key relative to the server I have to connect to, no ? Thanks, Xavier