Organizations are required by legal provision to include information system security into their day- today management activities. To do this effectively and efficiently, it is necessary that information security management integrates into the overall system life cycle. Here I will present a system life cycle and suggest which aspects of security should be covered at which life cycle stage of the system. Based on this, I will present a process framework that due to its iterativity and detailedness accommodates the needs for life cycle oriented security management.