Editing Binary image (section)

=== Visual cryptography ===
[[File:Visual crypto animation demo.gif|frame|right|A demonstration of visual cryptography: when two same-sized images of apparently random black-and-white pixels are superimposed, the [[Wikipedia]] logo appears]]
{{main|visual cryptography}}
In 1994, [[Moni Naor]] and [[Adi Shamir]] demonstrated a visual [[secret sharing]] scheme, where a binary image was broken up into ''n'' shares so that only someone with all ''n'' shares could decrypt the image, while any {{nowrap|''n'' − 1}} shares revealed no information about the original image. Each share was printed on a separate transparency, and decryption was performed by overlaying the shares.<ref>{{Cite book |doi = 10.1007/BFb0053419|chapter = Visual cryptography|title = Advances in Cryptology – EUROCRYPT'94|volume = 950|pages = 1–12|series = Lecture Notes in Computer Science|year = 1995|last1 = Naor|first1 = Moni|last2 = Shamir|first2 = Adi|isbn = 978-3-540-60176-0}}</ref> When all ''n'' shares were overlaid, the original image would appear. There are several generalizations of the basic scheme including ''k''-out-of-''n'' visual cryptography,<ref>{{cite journal |doi=10.1023/A:1008280705142|year=1997|last1=Verheul|first1=Eric R.|title=Constructions and Properties of k out of n Visual Secret Sharing Schemes|journal=Designs, Codes and Cryptography|volume=11|issue=2|pages=179–196|last2=Van Tilborg|first2=Henk C. A.|s2cid=479227}}</ref><ref>{{Cite journal |doi = 10.1016/S0304-3975(99)00127-9|title = Extended capabilities for visual cryptography|journal = Theoretical Computer Science|volume = 250|issue = 1–2|pages = 143–161|year = 2001|last1 = Ateniese|first1 = Giuseppe|last2 = Blundo|first2 = Carlo|last3 = Santis|first3 = Alfredo De|last4 = Stinson|first4 = Douglas R.|doi-access = }}</ref> and using opaque sheets but illuminating them by multiple sets of identical illumination patterns under the recording of only one single-pixel detector.<ref>{{cite journal|last1=Jiao|first1=Shuming|last2=Feng|first2=Jun|last3=Gao|first3=Yang|last4=Lei|first4=Ting|last5=Yuan|first5=Xiaocong|title=Visual cryptography in single-pixel imaging|journal=Optics Express|year=2020|volume=28|issue=5|pages=7301–7313|doi=10.1364/OE.383240|pmid=32225961|arxiv=1911.05033|bibcode=2020OExpr..28.7301J |s2cid=207863416}}</ref>