Bloom's taxonomy for cognitive domain is an effective taxonomy for structured learning. The six levels in Bloom's taxonomy for cognitive domain are based on the levels of difficulty. This paper focuses on teaching communication security and encryption by applying Bloom's taxonomy in the creation of educational materials and assessments. Delivering education material to the mobile phones is made possible with the advancement of mobile technologies, and the use of mobile technologies in teaching is gaining popularity because of its benefits. In this paper, delivering educational material to the mobile phones is experimented with by using a flash cards application for android based mobile phones. Experiential learning is learning by doing, is active, motivating and enables learners to retain knowledge to a greater extent. This paper provides a tool to learn RSA public key cryptographic algorithm through experiential learning.