Blostream Hybrid Stream Cipher This is a clear, concise on cryptography algorithm design and analysis, introducing the principles and techniques of cryptography. it is the first edition of a popular text, featuring new chapters on adversary arguments and selection, dynamic programming, and parallel algorithms. Highlights all algorithms are written in a modern language, using features of Matlab and Java. it emphasizes the importance of the algorithm analysis process , testing random number generator for key stream using NIST package ABOUT THE AUTHOR Dr Ali H. Kashmar is lecturer of computer science in Mathematical sciences Department at Baghdad University, Iraq.His area cryptography design and analysis. He received a Ph.D. from UKM, Malaysia. He also the author of cryptography, Mathematical analysis, and data security articles.