olemus
optilise kiirguse parameetritel põhinev krüptograafia

ülevaateid
https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.1043.4963&rep=rep1&type=pdf

http://spie.org/Publications/Book/2523506

näiteid
https://d3i71xaburhd42.cloudfront.net/f4a948b1694d30a7eb75b8b8aab0320203938677/1-Figure1-1.png

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742013000200011

https://aip.scitation.org/doi/10.1063/1.5092216

http://ijarcsse.com/Before_August_2017/docs/papers/Volume_6/7_July2016/V6I7-0199.pdf

https://cyberleninka.org/article/n/926403.pdf

https://mosis.engr.uconn.edu/wp-content/uploads/sites/2478/2017/08/Optical-Security-Proceedings-of-IEEE-2009.pdf

vt ka
- kvantkrüptograafia
- visuaalkrüptograafia