Yes, but it is strongly recommended in this case that you save your digital signature (.epf file) on a USB key.
Follow this help page for more information : I change my computer. Steps to follow.
WARNING: Saving a copy of your digital signature (.epf file) on multiple computers can be risky since it will be updated on one computer only (not necessarily the main one that you use). As a result, it will no longer function on your other computers.