The article defines the range of scientific-methodical and applied foundations of launching the mechanism of corporate innovation security within the framework of development of innovation activity and inclusion of corporation personnel in these processes. Groups of indicators for assessing innovation activity and basic innovation security of corporations have been created. Methods of multi-dimensional taxonomic analysis were introduced to distinguish safety indicators of innovation activity. The level of controllability of innovation activity of the corporation is estimated by the coefficient of safety of innovation activity, which combines diagnostic indicators of innovation processes in the corporation and forms the analytical field of vectors of innovation development. A mechanism for making and implementing management decisions to intensify innovation and ensuring corporate innovation security has been developed. The mechanism is based on an integrated assessment of the controllability of innovation activity of the corporation, which determines the ranked sequence of actions for setting and solving tasks within the corporate development program, as well as the use of a system for collecting and processing internal proposals for innovation. The algorithm of implementation of the mechanism of ensuring innovation security of corporation in the form of a flow diagram has been built. A computational model of virtualization of assessment of diagnostic indicators of innovation security of corporation based on the coefficient of safety of innovation activity has been developed.