PASSCODES

摘要

Protecting the security of an entity by using passcodes is disclosed. A passcode device 101 generates a passcode P_i. In an embodiment, the passcode P_i is generated in response to receipt of user information. The passcode P_i 1 is received by another system (e.g., administrator 102), which authenticates the passcode by at least generating a passcode P_ui from a passcode generator G_ui, and comparing the generated passcode P_ui with the received passcode P_i. The passcode (P_ui or P_i) is temporary. At a later use a different passcode is generated from a different passcode generator.