In dreams security is always negative and indicates you are protective in some way and the dream is asking you to let go of this security. The specific security mechanism is usually referred to in the same dream. For example, if a security guard is trying to impress a group, it means that your security blanket is to impress others with your gift. This is not the way to approach the subject matter of the dream – be comfortable within yourself regardless of how you think others perceive you.