The Internet has now become an integral part of everyday life for hundreds of millions of people around the world. The uses of the Internet have augmented commerce, communication, education, governance, entertainment, health care, etc. E-mail has become an indispensable part of life; the Web has become an indispensable source of information on just about everything; people now use governmentWebsitestoreceiveinstructionsandinformation, and?lepaperwork with the government; many major online businesses have been created, such as Amazon, eBay, Google, Travelocity, eTrade, etc. However, the uses of the Internet have also had serious negative e?ects, - cluding spam, the spreading of viruses and worms, spyware, phishing, hacking, online fraud, invasions of privacy, etc. Viruses and worms often bring down tens of millions of computers around the world; many people get duped into furni- ing their personal identi?cations, and bank and insurance account information, etc.; hackers break into government and corporation computers to steal cri- cal data; unsubstantiated rumors about individuals or organizations spread like wild?re on the Internet, etc. Further, the uses of the Internet are creating new paradigms in areas such as copyright, governance, etc. The widespread use of peer-to-peer ?le sharing systems, started by Napster, is forcing a reassessment of the value of holding copyright on digital media. Internet postings by vocal citizens to the Web sites of the news media, governmento?ces, and elected g- ernment o?cials are impacting government policies and swaying the opinions of other citizens. The aim of the International Conference on Human

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.