This book constitutes the refereed proceedings of the Second International Conference on Human.Society@Interet, HSI 2003,held in Seoul, Korea, in June 2003. The 57 revised full papers and 31 revised short papers presented were carefully reviewed and selected from 219 submissions. The papers are organized in topical sections on Web performance, authentication, social issues, security and document access, routing, XML, Internet applications, e-business, scheduling and resource allocation, wireless networks, Web components, multimedia communications, e-payment and auctions, cyber education, mobility and handoff, Internet protocols, mobile agents, and communications.