New optical random coding technique for security systems

Zeev Zalevsky, David Mendlovic, Uriel Levy, Gal Shabtay

Research output: Contribution to journalArticlepeer-review


A novel technique for random optical encoding is suggested. The proposed technique is based upon two binary masks: an encoding mask and a decoding mask. Each mask in itself is random, and contains no information that may be decoded. Only when the two masks are joined together, the decoded information is revealed. This way, the encoding of gray level as well as color information is possible. This approach is especially suitable for security applications.

Original languageEnglish
Pages (from-to)15-20
Number of pages6
JournalOptics Communications
Issue number1
StatePublished - 1 Jun 2000


FundersFunder number
Israeli Ministry of Science


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