You are a fairly reserved personality, so keeping secrets, no matter if they are yours or other people’s, is not particularly difficult for you. You actually feel the weight of the word “honor” in “honoring confidence”. The only possible reason for you spilling a secret out can be a crisis resolution.
Professional secrets are just as important for you as personal private matters. However, if you feel that the information that’s being concealed can help to avoid a problem at work, you will speak out. Another thing is that you may not give it out in full – only the bit that will help to save the situation.