Claims
- 1. A method to authenticate a smart card comprising the steps of:
extracting information from a digital watermark, the digital watermark being embedded in an optically variable device, the optically variable device comprising a watermark image embedded within a holographic structure; and extracting information from a smart card, the smart card carrying the optically variable device.
- 2. The method according to claim 1, wherein the extracted digital watermark information is compared with the extracted smart card information.
- 3. The method according to claim 2, wherein authentication is determined when the extracted digital watermark information matches the extracted smart card information.
- 4. The method according to claim 2, wherein authentication is determined when the extracted digital watermark information relates to the extracted smart card information in a predetermined mathematical manner.
- 5. The method according to claim 1, wherein the extracted digital watermark information is compared with predetermined information.
- 6. The method according to claim 5, wherein the extracted digital watermark information comprises at least one of a time stamp, key, predetermined identifier, and authentication code.
- 7. A reader operable to decode a watermark from a watermarked hologram, and to extract information from an information carrier, said reader comprising:
a watermark decoder for detecting a watermark signal in an image scanned from a watermarked hologram; a message decoder for extracting a message from the watermark signal; and a reader to extract information from the information carrier, the information carrier including the watermarked hologram.
- 8. The reader according to claim 7, wherein the information carrier comprises at least one of a smart card, credit card, RFID card, integrated circuit card, and magnetic-strip card.
- 9. A method to authenticate an information carrier comprising the steps of:
presenting an information carrier to a reader, the information carrier comprising a first data set and a second data set; in the reader:
decoding the first data set; and decoding the second data set; authenticating the information carrier based at least in part on the first data set.
- 10. The method according to claim 9, wherein the first data set is carried by a digital watermark.
- 11. The method according to claim 10, wherein the digital watermark is embedded in at least one of a hologram, a graphic, text, picture, background, logo, image, and photograph.
- 12. The method according to claim 11, wherein the information carrier comprises at least one of a smart card, credit card, RFID card, integrated circuit card, and magnetic-strip card.
- 13. The method according to claim 12, wherein said authentication step comprises comparing the first data set and the second data set.
- 14. The method according to claim 12, wherein said authentication step comprises comparing the first data set to a predetermined value.
- 15. The method according to claim 12, wherein said authentication step comprises indexing a database with data from the first data set.
- 16. The method according to claim 15, further comprising the step of receiving information from the database.
- 17. The method according to claim 16, further comprising the step of comparing the received database information with information from the card holder.
- 18. The method according to claim 9, wherein the reader comprises a first unit to read a digital watermark, and a second unit to read the smart card.
RELATED APPLICATION DATA
[0001] This application is a continuation in part of U.S. patent application Ser. No. 09/741,779, filed Dec. 21, 2000. The subject matter of the present application is related to that disclosed in U.S. Pat. No. 5,862,260, and in co-pending U.S. patent application Ser. No. 09/503,881, filed Feb. 14, 2000.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09741779 |
Dec 2000 |
US |
Child |
09923762 |
Aug 2001 |
US |