Protection Technologes for Paper Currency (Banknotes).

Paper currency protection mechanisms are analysed and structured in the article for further ranking and identifying the most important protection technique. The categories "paper currency", "paper currency protection", "banknote", "banknotes protection", "fake banknote" are researched using Internet analysis method. The problem of currency protection choosing is interpreted with the usage of graph theory. Mathematical interpretation of optimal currency protection model with the help of the generated classification was developed. [ABSTRACT FROM AUTHOR]