The objective of the Stream Cipher Cryptanalysis course is to provide a rigorous theoretical foundation for analyzing and breaking stream cipher systems. The course explores the mathematical structures underlying stream ciphers, such as linear feedback shift registers (LFSRs), nonlinear combiners, and filtering functions, and develops formal methods for evaluating their security. Emphasis is placed on the study of known cryptanalytic techniques—such as correlation attacks, algebraic attacks, and time-memory trade-offs—and their theoretical underpinnings. Students will learn to assess the resilience of stream ciphers against these attacks and understand the principles guiding the secure design of keystream generators.