The book is the part 1 of the series Guide to Cybersecurity. The book majorly focuses on how the begineer can start their career in this every green field of computer science. Also the major security that is focuses on is the web-security and deep web.
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Classical Cryptography starts with the history of Cryptography, then it takes a toll at all the cryptography that existed before 20th century. The book also deals with the cryptanalysis of these cipher techniques.
Book is available on Amazon Kindle.