TY - JOUR A1 - Al Abdulwahid, Abdulwahid A1 - Clarke, Nathan A1 - Stengel, Ingo A1 - Furnell, Steven A1 - Reich, Christoph T1 - Continuous and transparent multimodal authentication: reviewing the state of the art JF - Cluster Computing: The Journal of Networks, Software Tools and Applications KW - User authentication KW - Authentication technologies KW - Security KW - Usability KW - Continuous authentication KW - Biometrics KW - Transparent authentication Y1 - 2016 U6 - http://dx.doi.org/10.1007/s10586-015-0510-4 SN - 1386-7857 VL - 19.2016 IS - 1 SP - 455 EP - 474 ER -