Spectroscopic method and system for multi-factor biometric authentication

A multifactor authentication system comprising:

• a non-spectrometric biometric signature acquisition means, acquiring at least a single fingerprint image of a fingertip of a person to be authenticated and comprising a first portion of a detecting surface of a CCD or CMOS sensor and forming the fingerprint image on said first portion;
• a spectral information acquisition means, acquiring at least a single diffuse reflectance spectrum of the fingertip and comprising a second portion of said detecting surface of said CCD or CMOS sensor that differs from said first portion and spectrally dispersing diffusely reflected light from the fingertip onto said second portion;
• and
• an identity determination and verification means, comprising a computer or other information processing means and using the fingerprint image to determine the unique identity of the person to be authenticated and using the diffuse reflectance spectrum of the fingertip to verify that the person to be authenticated is a living human being with predetermined spectral characteristics.

A multifactor authentication system comprising:

• a sheet prism or other prism means;
• a light source;
• a non-spectrometric biometric signature acquisition means, acquiring at least a single fingerprint image of a fingertip of a person to be authenticated and comprising a first portion of a detecting surface of a CCD or CMOS sensor and a first optical system, in turn comprising at least a lens and forming the fingerprint image on said first portion;
• a spectral information acquisition means, acquiring at least a single diffuse reflectance spectrum of the fingertip and comprising a second portion of said detecting surface of said CCD or CMOS sensor that differs from said first portion and a second optical system, comprising at least a second lens and a diffraction grating and spectrally dispersing diffusely reflected light from the fingertip onto said second portion;
• and
• an identity determination and verification means, comprising a computer or other information processing means and using the fingerprint image to determine the unique identity of the person to be authenticated and using the diffuse reflectance spectrum of the fingertip to verify that the person to be authenticated is a living human being with predetermined spectral characteristics;
• and
• wherein the fingertip is placed on said sheet prism or other prism means, light from said light source is made incident on the fingertip via the sheet prism or other prism means, and said first optical system forms the fingerprint image on said first portion of said CCD or CMOS sensor at the same time that the second optical system spectrally disperse the diffusely reflected light from the fingertip onto said second portion of said CCD or CMOS sensor so that the fingerprint image and the diffuse reflectance spectrum of the fingertip are acquired simultaneously.

A multifactor authentication system comprising:

• a non-spectrometric biometric signature acquisition means, acquiring at least a single image of an iris of a person to be authenticated and comprising a CCD or CMOS sensor and a first optical system, forming the iris image on said CCD or CMOS sensor;
• a spectral information acquisition means, acquiring at least a single reflectance spectrum of the iris and comprising a photodiode array (PDA) and a second optical system, in turn comprising at least a diffraction grating and a beam splitter or half mirror and spectrally dispersing reflected light from the iris onto said PDA;
• and
• an identity determination and verification means, comprising a computer or other information processing means and using the iris image to determine the unique identity of the person to be authenticated and using the reflectance spectrum of the iris to verify that the person to be authenticated is a living human being with predetermined spectral characteristics;
• and
• wherein said first optical system forms the image of the iris on said CCD or CMOS sensor at the same time that said second optical system spectrally disperses the reflected light from the iris onto the PDA so that the iris image and the reflectance spectrum of the iris are acquired simultaneously.

A multifactor authentication system comprising:

• a non-spectrometric biometric signature acquisition means, acquiring at least a single image of an iris of a person to be authenticated and comprising a first portion of a detecting surface of a CCD or CMOS sensor and forming the iris image on said first portion;
• a spectral information acquisition means, acquiring at least a single reflectance spectrum of the iris and comprising a second portion of said detecting surface of said CCD or CMOS sensor that differs from said first portion and spectrally dispersing reflected light from the iris onto said second portion;
• and
• an identity determination and verification means, comprising a computer or other information processing means and using the iris image to determine the unique identity of the person to be authenticated and using the reflectance spectrum of the iris to verify that the person to be authenticated is a living human being with predetermined spectral characteristics.

A multifactor authentication system comprising:

• a non-spectrometric biometric signature acquisition means, acquiring at least a single image of an iris of a person to be authenticated and comprising a first portion of a detecting surface of a CCD or CMOS sensor and a first optical system, forming the iris image on said first portion;
• a spectral information acquisition means, acquiring at least a single reflectance spectrum of the iris and comprising a second portion of said detecting surface of said CCD or CMOS sensor that differs from said first portion and a second optical system, in turn comprising at least a diffraction grating and a beam splitter or half mirror and spectrally dispersing reflected light from the iris onto said second portion;
• and
• an identity determination and verification means, comprising a computer or other information processing means and using the iris image to determine the unique identity of the person to be authenticated and using the reflectance spectrum of the iris to verify that the person to be authenticated is a living human being with predetermined spectral characteristics;
• and
• wherein said first optical system forms an image of the iris on said first portion of said CCD or CMOS sensor at the same time that said second optical system spectrally disperses the reflected light from the iris onto said second portion of the CCD or CMOS sensor so that the iris image and the reflectance spectrum of the iris are acquired simultaneously.