Abstract : This paper describes a task based active learning module developed with projects to help students understand secure protocols, algorithms and modeling web applications to prevent attacks. We have been developing and continuously improving cyber security courses with methods for introducing important concepts for computing majors for more than a decade. Sequence diagrams (step by step diagram) , symbolic representations, and spatial circuit derivation from equations and algorithms are introduced to students to alleviate difficulties in mastering cryptographic algorithms. UML Sequence diagrams represent progression of events with time. Spatial circuits illustrate the transformation of equations and high level programming language constructs into special purpose hardware. These course materials can also be used in computer architecture or embedded systems courses to help students understand and develop special purpose circuitry. Keywords: Task based Learning; E-Commerce; Cryptographic algorithms; symbolic representations; Spatial circuits ; e-wallet; PayPal; UML Sequence diagrams.