Securities on the professional's properties form a significant way of accessing to credit. Despite many initiatives, means that enable to hold estates as security, such as stocks of goods, are not fully satisfying. The legal edifice, complex and opposed to the aim expected, prevents from using circulating assets as the basis of guarantee. This thesis identifies how to make required improvements to modernize the real security law, and so as to outline a new guarantee tool that makes the access to credit easier for companies, the global security.