The term, "untrusted" is used exclusively in the field of computer science and information security to denote code from an unknown source that may be potentially harmful to a system. It is distinguished from "untrustworthy" or "distrusted" in that the code may be useful and completely benign, whereas the terms "untrustworthy" and "distrusted" suggest something about the subject (whether it is a person or thing) that suggests that the person or thing is not to be trusted. For example, an "untrustworthy person" suggests a person who has lied or cheated in the past, suggesting a propensity to lie or cheat in the future.