The uses of internet in business are for information exchange, product catalog, promotion media, electronic mail, bulletin boards, electronic questioner, and mailing list. Internet can also be used for dialog, discussion, and consultation with customer online, therefore consumer can be proactively and interactively involved in designing, developing, marketing, and selling products. There are 2 methods for marketing products via internet, which are push and pull marketing. The advantages of internet in business strategy are global and interactive communication, information supply; consumer based service; increased cooperation; possibility to open new marketplace, product or services; and integrated the activity on-line. There are 2 applications in electronic commerce, which are business-to-business and business-to-consumer commerce. Electronic commerce payment transaction is arranged by Electronic Funds Transfer system, whereas the data security is governed by Secure Socket Layer, which then be developed to Secure Electronic Transaction.