Ihnatovych, Anatoliy2018-03-022018-03-022015Ihnatovych A. Effectiveness evaluation of modified block ciphers using standardized NIST statistical tests / Anatoliy Ihnatovych // Litteris et Artibus : proceedings of the 5th International youth science forum, November 26–28, 2015, Lviv, Ukraine / Lviv Polytechnic National University. – Lviv : Lviv Polytechnic Publishing House, 2015. – P. 76–79. – Bibliography: 6 titles.https://ena.lpnu.ua/handle/ntb/39504This research work proposes peculiarities of construction of modified block ciphers on the basis of inclusion of masking symbols. The analysis of effectiveness of the proposed block ciphers using the National Institute of Standards and Technology (NIST USA) statistical tests is done. Increasing of block ciphers’ effectiveness is described.encryptographyblock cipherefficiencyreliabilitymasking symbolNISTstatistical testsConference Abstract76-79