The critical Communication and Information Technology Infrastructure required for delivery of financial inclusion services of the Government to Citizen services has been considered as the Critical Infrastructure for research work by authors. On the basis of practical research work a novel, efficient, effective and sustainable system for ensuring safety, security and resilience of critical IT infrastructure has been presented in this article. The various types of attacks and threats reported in the literature were studied, the main reasons of security threats and attacks analysed. The solution hypothesis proposed. A new mode of computation, Real-time Advanced Inexpensive Network (RAIN) Computing proposed and a multi-level scalable, low cost security solution with RAIN computing to safeguard and ensure resilience of the critical IT infrastructure for e-Governance projects presented. Though focus of experimentation is critical IT & C infrastructure, security methodology presented in the paper can be extended to safeguard other types of CI also. ©Springer International Publishing Switzerland 2014. © Springer International Publishing Switzerland 2014.