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Collision in double random phase encoding

✍ Scribed by Guohai Situ; David S. Monaghan; Thomas J. Naughton; John T. Sheridan; Giancarlo Pedrini; Wolfgang Osten

Book ID
103873863
Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
227 KB
Volume
281
Category
Article
ISSN
0030-4018

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✦ Synopsis

Collision is a situation that occurs when two or more distinct inputs into a security system produce identical outputs, which is undesirable in some security applications. This is especially true of the applications of watermarking and authentication. In this manuscript we present a study of the collision property of double random phase encoding. We show that one can produce meaningful collisions from the cyphertext of a watermark embedded in a host image by use of phase retrieval techniques.

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Color image encryption using double rand
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A new encryption technique is proposed to encrypt color images using existing optical encryption systems for gray-scale images. The color images are con¨erted to their indexed image formats before they are encoded. At the decryption end, the color images are reco¨ered by con¨erting the decrypted ind