Described is a possibility to solve, with the help of systematic approach, the main dilemma of information protection systems development - necessity of initially integral approach and limited security budgets, enabling to develop the system only on step-by-step basis. The basis for dilemma solution -utilization of information protection means, conforming to open international standards. It is noted, that utilization of one or another information protection means can influence the whole strategy of corporate communication and information systems development. As on example of such means, enabling to effectively develop the system, VPN ZASTAVA is quoted, which is designed for creating virtual protected channels in open networks.