Patent ID: 8898749

Claim:
Method for one-time password generation, the one-time password being used for user authentication by a restricted resource, wherein the one-time password is generated by means of a mathematical algorithm in a user-specific device, and wherein the one-time password is generated by the mathematical algorithm using at least one user-specific password generation parameter, comprising using the device to perform the steps of: transmitting a request to a restricted resource, said request configured to cause said restricted resource to instigate the generation of said at least one user specific password generation parameter by a trusted entity; receiving, in response to said request to the restricted resource, the at least one user-specific password generation parameter together with an identity of the associated restricted resource to which the password generation parameter makes authentication possible; using a first password generation parameter of said at least one password generation parameter to generate a first one-time password for use in user authentication by a first restricted resource, and using a second password generation parameter of said at least one password generation parameter to generate a second one-time password for use in user authentication by a second restricted resource, wherein the second restricted resource is different from the first restricted resource, and wherein the first and second password generation parameters are distinct.