Books by John R. Vacca

By allowing digital signatures to be as valid as handwritten signatures, public key infrastructure (PKI) provides businesses with a quick alternative to the sometimes lengthy process of documentation. This book shows programmers and engineers how to build appropriate layers of security throughout the network.

i-mode is NYY SoCoMo's mobile Internet access system. It allows users to access email, weather, stock prices, message friends and buy airline tickets from their cellular phones. This book provides everything a service provider needs to know to gauge the effect of i-mode on his or her business.