Personal authentication system

• US 4,532,508 A
• Filed: 04/01/1983
• Issued: 07/30/1985
• Est. Priority Date: 04/01/1983
• Status: Expired due to Term

• Current Assignee: Siemens Corporate Research & Support, Inc. (Siemens AG)
• Original Assignee: Siemens Corporate Research & Support, Inc. (Siemens AG)
• Inventors: Ruell, Hartwig
• Primary Examiner(s): Yusko, Donald J.
• Application Number:
  US06/481,198
• Time in Patent Office: 851 Days
• Field of Search: 340/825.34, 340/825.3, 356/71, 382/4, 382/31
• US Class Current: 340/5.83
• CPC Class Codes: G07C 9/257 electronically G07C9/26 takes precedence
• CPC Class Codes: Y10S 283/904 Credit card

Abstract

A method and apparatus for storing, in scrambled form, information relating to the personal features of a person. This information can be stored on a portable storage medium which can be carried by the person and used to gain access to a secured area by on-site decoding and verification of the stored information.

Claims

1. The method of storing scrambled information on a portable storage medium using a coherent light beam for personal identification purposes, which comprises the steps of:

(a) sensing the personal features of a person;

(b) deriving at least one information signal indicative of said sensed personal features;

(c) developing a distinct scramble key directly from the sensed personal features indicated by said information signal;

(d) using said scramble key to encode the coherent light beam to produce a modulated reference light beam; and

(e) storing a holographic image on said portable storage medium using said modulated reference light beam.

2. The method of verifying the identity of a person using a portable storage medium on which encoded personal identification information signals have been stored, which comprises, the steps of:

(a) sensing the personal features of said person to be identified;

(b) deriving present information signals indicative of said sensed personal features;

(c) developing a scramble key from said present information signals;

(d) deriving a first set of comparison signals from said present information signals;

(e) sensing said encoded personal identification information signals stored on said portable storage medium;

(f) decoding said encoded personal indentification information signals read from said portable storage medium, said scramble key being used to decode said personal identification information signals;

(g) deriving a second set of comparison signals from said decoded personal identification information signals; and

(h) comparing said first and said second set of comprison signals to verify identity of said person.

3. Apparatus for storing scrambled information on a portable storage medium using a coherent light beam comprising:

(a) means for sensing personal features of a person from an image;

(b) converting means connected to said sensing means for producing information signals corresponding to said sensed personal features;

(c) receiving means connected to said converting means for receiving said information signals and developing a distinct scramble key from said information signal;

(d) encoding means connected to said receiving means for encoding the the coherent light beam according to said scramble key to produce an encoded reference light beam; and

(e) means, including the portable storage medium, connected to sad encoding means for storing an encoded holographic image on said portable storage medium using said encoded reference light beam.

4. Apparatus for verifying the identity of a person using a portable storage medium on which encoded personal identification information has been stored in a scrambled holographic image comprising:

(a) sensing means for sensing personal features of a person;

(b) processing means connected to said sensing means for deriving present information signals corresponding to said sensed personal features;

(c) coding means connected to said processing means for developing a scramble key from said present information signals and

to be used as a first set of comparison signals from said present information signals;

(d) decoding means connected to said coding means for sensing and decoding the scrambled holographic image on said portable storage medium using the scramble key derived from said present information signals; and

(e) comparing means, connected to said decoding means, for deriving a second set of comparison signals for comparing said first and said second set of comparison signals to verify identity of said person.