Study on Costs of Software-based Heterogeneous Redundant Execution

Software-based redundant execution (SRE) is a popular fault-tolerant design method which makes use of faults occurring randomly. Software-based heterogeneous redundant execution (SHRE) uses heterogeneous redundant software replicas with identical function based on SRE and diversity of software. By voting the results of heterogeneous redundant software replicas, SHRE can resist threats from software vulnerabilities and monoculture. SHRE resisting network attacks was proved to be reliable. The classification method of SHRE was proposed, and the costs analysis method of SHRE was introduced. Finally, the costs calculation process was taken as an example.