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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 11, Iss. 2 — Feb. 1, 2013
  • pp: 020901–

Fast numerical generation and hybrid encryption of a computer-generated Fresnel holographic video sequence

Peter Tsang, K.W.-K. Cheung, and T.-C. Poon  »View Author Affiliations


Chinese Optics Letters, Vol. 11, Issue 2, pp. 020901- (2013)


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Abstract

Research demonstrates that a Fresnel hologram can be generated and simultaneously encrypted numerically based on a secret symmetric key formed by the maximal length sequence (M-sequence). The method can be directly extended to encrypt a video holographic clip in a frame-by-frame manner. However, given the limited combination of signals in the family of M-sequence, hacking the secret key through trial and error can be time consuming but not difficult. In this letter, we propose a method that is difficult to crack with brute force for encrypting a holographic video sequence. An M-sequence is first randomly assigned to encrypt each frame of the holographic video signal. Subsequently, the index of the selected M-sequence, which is necessary to decrypt the hologram, is encrypted with the RSA algorithm before transmitting to the receiving end. At the receiving end, the decoder is provided with a private key to recover the index for each frame, and the corresponding M-sequence is used to decrypt the encoded hologram.

© 2013 Chinese Optics Letters

OCIS Codes
(090.0090) Holography : Holography
(090.1760) Holography : Computer holography
(090.1995) Holography : Digital holography

Citation
Peter Tsang, K.W.-K. Cheung, and T.-C. Poon, "Fast numerical generation and hybrid encryption of a computer-generated Fresnel holographic video sequence," Chin. Opt. Lett. 11, 020901- (2013)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-11-2-020901

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