1. A method for authentication and/or identification of persons, objects, service systems or computer programs, in which a static, not changing, security feature is created or used, which is characteristic for the person, the object, the service system or the computer program, which is then changed under the influence of an unpredictable factor, and thereby converted into a dynamic security feature, comprising the steps: a. Storing the static security feature in a storage medium, b. Assigning the static security feature or parts thereof to a specific person, an object, a service system or a computer program, c. Converting, recalculating or activating the static security feature or parts thereof by a dynamic, unpredictably changing factor into a dynamic security feature, in which the entire security feature or a part thereof vis-a-vis the original static security feature or a part thereof is changed, d. Comparing the altered dynamic security feature or a part thereof with the static security feature stored in the storage medium at a query time, wherein the person and/or object and/or the service system and/or the computer program is/are then authenticated positive, when the dynamic security feature vis-a-vis the static security feature stored in the storage medium has changed at least partially by a dynamic factor between two query times, whereby the static security feature stored in the storage medium corresponds to the last updated, modified dynamic security feature of the last query time.