The main element of electronic commerce is communication, in particular exchange of information between senders and recipients. These exchanges concern three actors: consumers, businesses and public bodies. The categories of ecommerce, are as follows:
• Business to Business (business – to – business – B2B): electronic commerce conducted between businesses, without any involvement of the consumer. An enterprise uses an electronic network for orders from suppliers and thus receives invoices and make payments. In this way enterprises are enabled to improve their cooperation, simplifying procedures and procurement costs and contributing to faster shipping supplies and more effective control of stock levels.
• Business to consumer (business – to – consumer – B2C): This trade is between businesses and consumers. It is widely known as electronic retailing. Clients have to identify and purchase goods and services directly from the Internet.
• Consumer to Consumer (consumer – to – consumer – C2C): is trade between two consumers. The C2C transactions operate in analogy to the traditional trading methods. Methods corresponding for example classifieds and auctions.
• Business to Government (business – to – government – B2G): business with government agencies. These types of transactions are usually undertaken in the public interest to make the system more reliable and correct. Examples of such transactions are electronic processing corporation tax liabilities, competitions for public works or supplies, the electronic completion and submission of documents or applications and the electronic provision of information on trade issues.
• Consumer to government (consumer – to – government – C2G): Refers to public transactions with government bodies and includes informing the public about the services provided by the state and the handling of affairs with public services electronically.