This chapter outlines and discusses issues of law, privacy, trust and security relating to e-business. Key issues include the formation of contracts under English law and European law and intellectual property rights, data protection and privacy. The issue of privacy links in to the section on building trust in the e-business environment. Here, the treatment of trust is from the perspectives of consumer/ business and business/business relationships. The chapter also addresses security issues relating to e-business and highlights types of internet security breaches and the techniques used to combat them.