olemus
arvutusteta krüptograafiakrüptograafiaharu, mis tegeleb visuaalteabe krüpteerimise meetoditega
= a branch of cryptography dealing with visual information encryption methods not needing math for decryption

ülevaateid
https://en.wikipedia.org/wiki/Visual_cryptography
http://www.ijtrd.com/papers/IJTRD1375.pdf
https://link.springer.com/content/pdf/10.1007/BFb0053419.pdf
https://fardapaper.ir/mohavaha/uploads/2018/12/Fardapaper-A-Comprehensive-Study-of-Visual-Cryptography.pdf
https://turcomat.org/index.php/turkbilmat/article/download/2374/2085/4487
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9946/99460X/Application-of-visual-cryptography-for-learning-in-optics-and-photonics/10.1117/12.2237923.full?SSO=1
https://www.ripublication.com/ijaer18/ijaerv13n13_50.pdf
https://www.acadpubl.eu/jsi/2018-118-7-9/articles/8/61.pdf
https://peerj.com/preprints/2682.pdf

vt ka
- steganograafia