Select your personal key to enable the use of OpenPGP, or your personal certificate to enable the use of S/MIME. For a personal key or certificate you own the corresponding secret key.
Dewiswch eich allwedd bersonol i alluogi defnyddio OpenPGP, neu'ch tystysgrif bersonol i alluogi defnyddio S/MIME. Ar gyfer allwedd neu dystysgrif bersonol chi sy'n berchen ar yr allwedd gyfrinachol gyfatebol.