No PGP keys should be shown when signing OOXML documents.
Moving to NEW
Samuel Mehrbrodt committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=9b4c6892630a98c1218aca72827f718184a4b5f0 tdf#118569 Signature Line: When signing ooxml, only show X.509 certificates It will be available in 6.2.0. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.