Patent ID: 8184867

Claim:
A method for biometric identification or authentication of persons, comprising: protecting with a projection unit a display image field onto a retina of a person, wherein different parts of the image field correspond to different images among a plurality of images concurrently projected onto the retina as part of the image field, each of the concurrently projected images being of unique content and unique position within the image field; detecting with a detection unit biometric retinal characteristics of the retina; comparing the detected biometric retinal characteristics with stored biometric retinal characteristics of authorized personnel to identify the person; accessing a database of security sequences in which for each respective authorized person there is stored a respective security sequence, wherein said accessing is to identify the security sequence for the person identified by said comparing; analyzing a time sequence of detected biometric retinal characteristics of the person to identify whether changes occur at an eye of the person including at least one of voluntary movements, positioning or focus in a manner by which the eye is determined to be positioned to focus on one select image among the plurality of concurrently projected images at one given time while not focusing on other images among the plurality of concurrently projected images, wherein a sequence of different one select images, among the plurality of concurrently projected images in the image field, determined as being focused upon in time sequence defines an input sequence; and determining whether the input sequence corresponds to said accessed security sequence, and indicating said person as being authenticated when said input sequence is determined as corresponding to said accessed security sequence, wherein said determining compares said at least one of voluntary movements, positioning or focus changes of the eye during said input sequence with an expected pattern of pre-specified directions for pre-specified position intervals corresponding to the accessed security sequence to determine whether said eye changes occur to define eye movement in said pre-specified directions for pre-specified position intervals within the projected image field of the plurality of concurrently projected images during the input sequence.