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The first edition of this award-winning book attracted a wide audience. This second edition is both a joy to read and a useful classroom tool. Unlike traditional textbooks, it requires no mathematical prerequisites and can be read around the mathematics presented. If used as a textbook, the mathematics can be prioritized, with a book both students and instructors will enjoy reading. Secret History: The Story of Cryptology, Second Edition incorporates new material concerning various eras in the long history of cryptology. Much has happened concerning the political aspects of cryptology since the first edition appeared. The still unfolding story is updated here. The first edition of this book contained chapters devoted to the cracking of German and Japanese systems during World War II. Now the other side of this cipher war is also told, that is, how the United States was able to come up with systems that were never broken. The text is in two parts. Part I presents classic cryptology from ancient times through World War II. Part II examines modern computer cryptology. With numerous real-world examples and extensive references, the author skillfully balances the history with mathematical details, providing readers with a sound foundation in this dynamic field. FEATURES Presents a chronological development of key concepts Includes the Vigenère cipher, the one-time pad, transposition ciphers, Jefferson’s wheel cipher, Playfair cipher, ADFGX, matrix encryption, Enigma, Purple, and other classic methods Looks at the work of Claude Shannon, the origin of the National Security Agency, elliptic curve cryptography, the Data Encryption Standard, the Advanced Encryption Standard, public-key cryptography, and many other topics New chapters detail SIGABA and SIGSALY, successful systems used during World War II for text and speech, respectively Includes quantum cryptography and the impact of quantum computers
First published in 1973, this two-volume set summarises and structures the contributions by researchers at the Fourth International EDRA Conference, held in April 1973. The first volume focuses on the proceedings of the paper sessions. The second volume focuses on the symposia, invited papers and the workshops. This set will be of interest to students of architecture and design.
Gavesanam deals with the Vedic discourse on many levels. It is mostly with the Rgvedic and the Yajurvedic texts, that is, with the hymns and the ritual texts, that it does so. The work shows a search for an insight into the highly cultivated poetic mind of the Rsis, which displays mystery and myth, knowledge and secrecy in their creations. The first two chapters illustrate with some clarity the method which is adopted in order to come to grips with a few of the symbolic and metaphorical, mythic and ritualistic texts and lays the foundation for the rest of the essay. The approach is interpretive and, therefore, necessarily speculative. In the main, the procedure is neither classificatory nor descriptive of the texts, since many scholars have done excellent work in this manner. The present exercise highlights the importance of the Vedic Ida, the Vedic World, the Vedic gods and goddesses like the Mitravaruna, Agni, Vak, Visnu, Sarasvat, Soma, and so on, from an interpretive point of view. A few figures make comprehension easier and more concrete. The work as a whole may be considered to be a long essay of progressive approximations, which means that the thoughts that are presented have to be corrected and complemented by further approximations in a truly academic and scientific spirit. Such an effort opens a new way for a better understanding and appreciation of the Vedic and the post-Vedic literature and culture.