Cryptography is now ubiquitous – moving beyond the traditional environments‎,‎ such as government communications and banking systems‎,‎ we see cryptographic techniques realized in Web browsers‎,‎ e‎-mail programs‎,‎ cell phones‎,‎ manufacturing systems‎,‎ embedded software‎,‎ smart buildings‎,‎ cars‎,‎ and even medical implants‎.‎ Today‎'‎s designers need a comprehensive understanding of applied cryptography‎.‎ After an introduction to cryptography and data security‎,‎ the authors explain the main techniques in modern cryptography‎,‎ with chapters addressing stream ciphers‎,‎ the Data Encryption Standard ‎(‎DES‎)‎ and 3DES‎,‎ the Advanced Encryption Standard ‎(‎AES‎)‎‎,‎ block ciphers‎,‎ the RSA cryptosystem‎,‎ public‎-key cryptosystems based on the discrete logarithm problem‎,‎ elliptic‎-curve cryptography ‎(‎ECC‎)‎‎,‎ digital signatures‎,‎ hash functions‎,‎ Message Authentication Codes ‎(‎MACs‎)‎‎,‎ and methods for key establishment‎,‎ including certificates and public‎-key infrastructure ‎(‎PKI‎)‎‎.‎ Throughout the book‎,‎ the authors focus on communicating the essentials and keeping the mathematics to a minimum‎,‎ and they move quickly from explaining the foundations to describing practical implementations‎,‎ including recent topics such as lightweight ciphers for RFIDs and mobile devices‎,‎ and current key‎-length recommendations‎.‎ The authors have considerable experience teaching applied cryptography to engineering and computer science students and to professionals‎,‎ and they make extensive use of examples‎,‎ problems‎,‎ and chapter reviews‎,‎ while the book’s website offers slides‎,‎ projects and links to further resources‎.‎ This is a suitable textbook for graduate and advanced undergraduate courses and also for self‎-study by engineers‎.‎