For this key, you have both the public and the secret part. You may use it as a personal key. If this key was given to you by someone else, then don't use it as a personal key.
Yn yr allwedd hon, mae gennych rhan gyhoeddus a rhan gyfrinachol. Gallwch ei defnyddio fel allwedd bersonol. Os rhoddwyd yr allwedd hon i chi gan rywun arall, yna peidiwch â'i defnyddio fel allwedd bersonol.