Abstract: A method for biometric authentication of a user by a challenge/response procedure with a mobile station includes authenticating the enrolled user before performing a transaction by: setting up a communication channel between the mobile station and the authentication server; forwarding a challenge from the authentication server to the mobile station; recording a response sequence expressed by the user and recording simultaneously ambient signals or a response of the ambience; forwarding the recorded response sequence and the recorded ambient signals to the authentication server; evaluating the recorded response sequence based on related biometric data retrieved from the database and verifying whether the user corresponds to the enrolled user; evaluating the ambient signals and identifying signal changes within the ambient signals; and determining whether the identified signal changes represent a logical sequence of events in the user's vicinity.

Abstract: A method for biometric authentication of a user by a challenge/response procedure with a mobile station includes authenticating the enrolled user before performing a transaction by: setting up a communication channel between the mobile station and the authentication server; forwarding a challenge from the authentication server to the mobile station; recording a response sequence expressed by the user and recording simultaneously ambient signals or a response of the ambience; forwarding the recorded response sequence and the recorded ambient signals to the authentication server; evaluating the recorded response sequence based on related biometric data retrieved from the database and verifying whether the user corresponds to the enrolled user; evaluating the ambient signals and identifying signal changes within the ambient signals; and determining whether the identified signal changes represent a logical sequence of events in the user's vicinity.

Abstract: A method allows for the biometric authentication of at least a first and a second user jointly representing a first legal entity or individually representing a first and the second legal entity with at least a first mobile station. The method includes the steps of enrolment and authenticating the users before performing a transaction by transferring biometric data to the authentication server that were captured from the first and the second user and by comparing the biometric data of the users received from the mobile station with biometric data retrieved from the database. The result is the provision of the corresponding authentication results required for the execution of the transaction.

Abstract: The system and method performing secure online-transactions based on challenge/response procedures executed by a terminal of at least one customer and by a terminal of a service provider, such as a bank, which terminals are connected to a network, preferably the Internet.

Abstract: The system and method performing secure online-transactions based on challenge/response procedures executed by a terminal of at least one customer and by a terminal of a service provider, such as a bank, which terminals are connected to a network, preferably the Internet.