Hello, First of all thank you for your prompt answer, but I use gpg 1.0.6 and do= not=20 see this option documented anywhere in the man page. When I try this opti= on=20 it says : Invalid command (try "help") Is this a new command from gpg 1.2.x ? Is there any compatibility issues if I upgrade from 1.0.6 to 1.2.x ? Thanks for your time.