Patent ID: 8930702
Filing Date: 2015-01-06
Classification: G06F,H04L

Abstract:
1. A strong authentication token for generating dynamic security values comprising: a trustworthy user output interface for communicating generated dynamic security values to a user; an acoustical input interface for acoustically receiving input data, the acoustical interface comprising a microphone and a demodulation circuit connected to the microphone adapted to demodulate an acoustical signal received by the microphone, wherein the acoustical signal is modulated using a frequency shift keying modulation scheme using a plurality of coding frequencies to code the acoustical signal, whereby each coding frequency is an integer multiple of a common base frequency, and wherein the demodulation circuit comprises a phase-locked loop tuned to the common base frequency and receiving as input an electrical signal representative of the received acoustical signal; and a data processing component connected to the demodulation circuit, the data processing component adapted to recover input data transmitted in the received acoustical signal after the acoustical signal is demodulated by the demodulation circuit, to process the recovered input data, and to generate the dynamic security values.