Cryptography Around Us

This book describes the use of cryptography in everyday life. It begins by explaining the properties of selected cryptographic functions, such as encryption, hashing, and similar concepts. Using these general functions, it then describes the transmission protocols PGP, TLS, WPA, IPsec, SSH, Tor, DNSsec, IKE, and MACsec; the authentication protocols DAA, EAP, Kerberos, and OpenID Connect; the authorisation protocol OAuth; the access protocol RADIUS; and finally, the payment protocols 3D Secure and Bitcoin. Additionally, the book covers electronic access control systems, electronic banking, and payment card protocols.