Personal security system

摘要: A method and apparatus are provided for verifying the identity of a system user. Each user has token which processes an inputted seed to generate stored value is either current or function thereof. This then changed new in response each plurality selectively generated trigger signals. The selected thereof outputted, example by being displayed on token, received into host verification unit. unit generates (and outputted where required) user, indicated input also with output, compares values verify