On the command-line of all supported platforms: The following commands export and import GNUPG keys:http://www.web-blog.net/comments/P175_0_1_0/http://www.sente.ch/software/GPGMail/English.lproj/GPGMail.htmlgpg - -list-secret-keysgpg - -armor - -export-secret-keys 12345678 > EXPORTIERTER-SECRET-KEY.ascgpg - -import EXPORTIERTER-SECRET-KEY.asc