An audio signal which is introduced directly in the head, in future mobile devices should be protected from abuse. Each bone transmits sound in characteristic ways. Thus, there is a new bio-metric feature similar to the fingerprint.
PIN codes and passwords easy to forget your own head man – hardly. He should in the future the typing of numbers and letters or the biometric reader, which checks finger or Iris, eliminating, when an electronic device is unlocked to be. Scientists from the cluster of excellence for multimodal suggest that in any case, computing and interaction of the University of Saarland, the nearby Max Planck Institute for computer science and the University of Stuttgart. The skull bone is used as a key, transmits the sound to the ear when the speaker has direct contact. The frequencies vary a little on the way there. Who finally arrive, are characteristic of every human being.
Google glass as a research unit
The Saarland researchers are using this phenomenon. As an experimental device they Google Glass chose a glasses computer of the Internet giant. He transmits speech and music of the so-called bone conduction speaker, which is embedded in the frame close to the right ear guard. This is a sound generator that has direct contact with the skull.
If someone puts on the glasses of data automatically sounds an acoustic signal that is fed and can be heard in the skull bone. Also built-in microphone captures sound. The glasses computer compares it to the stored pattern and releases the device, if it finds a match.
Thief puts glasses service protection.
“Because of the skull bones varies, the audio signal to one for every human characteristic manner is changed” the computer scientist says Andreas Bulling, who heads the research team. “We use the exiting the skull bone sound signal then a biometric feature.” The success rate is 97%.
The researchers want to use this technique for other devices. The Smartphone could be unlocked by briefly pressed to his head. Laptops, Tablet PCs and other mobile devices are also settled against thieves who have bent to the stored data, protected by the skull bone identification. “It is enough, if the signal is played for a second. Thus we are well half a second”faster than classical, non-biometric procedures that recognize the legitimate users on mobile devices, Bulling said.
Banks strongly interested in bio-metric security systems
Biometric methods are strong on the rise. So the British Bank Barclays online banking wants to make even more secure with a biometric scanner that detects the development of blood vessels in the fingers. And the Halifax Bank provided test customers with a bracelet, which acts as an electrocardiogram device and measuring the heartbeat of the wearer, which can then be used as password. But even biometric passwords have their limitations: U.S. researchers succeeded with a few voice samples and freely available editing software security systems to circumvent, which identify a person using their voice.