Cryptography in the Information Society

This textbook describes the main techniques and features of contemporary cryptography, but does so using secondary school mathematics so that the concepts discussed can be understood by non-mathematicians. The topics addressed include block ciphers, stream ciphers, public key encryption, digital signatures, cryptographic protocols, elliptic curve cryptography, theoretical security, blockchain and cryptocurrencies, issues concerning random numbers, and steganography. The key results discussed in each chapter are mathematically proven, and the methods are described in sufficient detail to enable their computational implementation. Exercises are provided.Contents: PrefaceAcknowledgmentsIntroductionPublic Key CryptosystemsSolving Discrete Logarithm ProblemDigital SignaturesCryptographic ProtocolsElliptic Curve CryptosystemsTheoretical Security of CryptosystemsModern Secret Key Ciphers and Hash FunctionsCryptocurrencies and the BlockchainRandom Numbers in CryptographySteganographyAnswers to Problems and ExercisesBibliographyIndex
Readership: University professors and students at undergraduate, graduate, and PhD levels, as well as industry practitioners and those who wish to start a career in cryptography. Cryptography;Steganography;Public Key Cryptosystems;Blockchain;Cryptocurrency;Bitcoin;Cryptographic Protocols;Elliptic Curve Cryptography;Digital Signatures;Block Ciphers;Stream Ciphers;Cryptographic Hash Functions;Theoretical Security;Perfect Secrecy0Key Features:The book is based on simple "secondary school" mathematicsAll the main ideas and methods of modern cryptography are strictly describedAlgorithms are presented in a form ready for computer implementationNumerical examples and exercises are provided for most topics