Comprehensive and practical guide includes: Public Key Infrastructure (PKIs); important when using cryptography within a large organization, differences between protocols SSL and IPSec standards, integration of cryptography into different layers of OSI, and how to decide whether hardware or software solutions that really means to achieve this. The book also includes sections on:: standardization authentication elliptic curve cryptography chip card mode algorithms and protocols - including SSL, TLS, IPSec, SMIME and PGP protocols cryptography's connection with biometry (using biological characteristics for authentication purposes).