As many organizations are transforming their businesses through the development of information and communications technologies, security is now a key enabler for e-business. This volume presents an overview of current and future infrastructures for e-business including XML security mechanisms and next generation Public Key Infrastructures (PKI) as well as digital archiving and wireless security, which is set to be a huge growth area with the full rollout of 3G mobile networks. TETRA security, firewalls and Virtual Private Network (VPN) technologies are all discussed to provide business solutions for end-to-end secure networking. The text is designed for IT and security professionals involved in the implementation of security in e-business.