System and method for object authenticity detection

A system for determining authenticity of an object, the system comprising:

• a light source (104), directing light toward an authentication region (116) on said object, said light being one of collimated and telecentric, said light impinging on said authentication region at a predetermined oblique angle relative to the normal of a plane defined by said object, a portion of said light being reflected from said authentication region toward a specular reflection region, another portion of said light being scattered from said authentication region;
• an imager (102) including a imaging sensor (103), said imager (102) being substantially focused on said authentication region, said imager (102) acquiring at least one focused image (118) of said scattered light, said image at least including image features related to surface features scattering phenomena of said authentication region, said specular reflection region and a region defined by said imaging sensor are mutually exclusive in space;
• and
• a processor (106), coupled with said imager (102), said processor (106) determining correspondence between at least a part of said at least one acquired image and a corresponding part of at least one stored image, said at least one stored image also corresponding to said authentication region,
• wherein said processor (106) identifies said object as authentic when said at least a part of said acquired image corresponds to said corresponding part of said at least one stored image,
• wherein said processor (106) identifies said object as non-authentic when said at least a part of said acquired image does not corresponds to said corresponding part of said at least one stored image, and
• wherein said oblique angle (θ) is determined such that said scattered light coherently interferes at the sensor plane.