Prof. Dr. Hans Delfs is a member of the Dept. of Computer Science at the Technische Hochschule Nürnberg Georg Simon Ohm. His research and teaching interests include cryptography and information security, database design, and software architectures.Prof. Dr. Helmut Knebl is a member of the Dept. of Computer Science at the Technische Hochschule Nürnberg Georg Simon Ohm. His research and teaching interests include cryptography and information security, algorithms, and theoretical computer science.

• Introduction.- Symmetric-Key Encryption.- Public-Key Cryptography.- Cryptographic Protocols.- Probabilistic Algorithms.- One-Way Functions and the Basic Assumptions.- Bit Security of One-Way Functions.- One-Way Functions and Pseudorandomness.- Provably Secure Encryption.- Unconditional Security of Cryptosystems.- Provably Secure Digital Signatures.- App. A, Algebra and Number Theory.- App. B, Probabilities and Information Theory.- References.- Index.

“The book has several new inclusions over its previous editions including the SHA-3 algorithm for hashing and ElGamal encryption. … The authors also include a textual context for each of the ciphers and hashing algorithms with both historical significance and potential application, which makes this an excellent reference book for graduate-level learners, researchers, and professionals. Overall, this work … offers an excellent view of the current state of cryptography. … Summing Up: Highly recommended. Graduate students, researchers/faculty, and professionals/practitioners.” (T. D. Richardson, Choice, Vol. 53 (11), July, 2016)“This is a thorough introductory text on cryptography from an engineering viewpoint. It provides a good overview of the whole subject, including secret-key (‘symmetric’) and public-key methods, hash functions, and signing. There’s a 90-page appendix that summarizes the mathematics needed (mostly number theory, with some abstract algebra and probability).The book is well-written and easy to follow.” (Allen Stenger, MAA Reviews, maa.org, April, 2016)“Delfs and Knebl in this book focus on the mathematical aspects of cryptography. … this book is best suited for a graduate course in mathematics. … recommend this book for readers with strong mathematical backgrounds who are interested in the foundations of the field.” (Burkhard Englert, Computing Reviews, March, 2016)