Use of one-time passwords OTP

This bachelor thesis discusses the use of one time passwords. Thesis is initially focused on the ways of the authentication and then on the use of one time passwords. One-time passwords are those passwords which are valid for only one authentication or transaction. After that they lose their validity. One-time passwords no longer exist after their use, so they are resistant to repeated attacks. Furthermore, the comparation of security between ordinary passwords and one-time passwords is discussed. Further, there is shown a comparison of different types of one-time passwords. There is a description of their creation and distribution to users. The practical part describes the implementation of open-source solution of OTP. Implementation is carried out using a plug-in to a website created in WordPress content management system. In the first part of the practical part, the selection of the plugin by selected criteria is described. In the second part of the practical part, the implementation of plugin is realized