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. Public Key Infrastructure shows programmers and engineers how to build appropriate layers of security throughout the network, letting businesses put to rest concerns of how to protect assets and freeing them to concentrate on adding value for employees, customers, and business partners. The book also takes a close look at what constitutes effective public key infrastructures, why their protection is crucial to success, and some thoughts for consideration prior to implementing custom PKIs.