Efficient packet-injection resistant data source authentication protocol for group communication

In order to resolve of the problem that SAIDA and eSAIDA cannot resistant packet injection and PRABS's communication cost is too large, an efficient packet-injection resistant multicast source authentication protocol (EPJRSA) was proposed. Using merkle hash tree, EPJRSA can find packets injected by attacker before verifying erasure codes and signature. EPJRSA's communication cost is about 7%-9% of PRABS. The cost of computing and verifying authentica-tion information in EPJRSA is also less than in PRABS. The result shows that EPJRSA has better performance than PRABS and can resistant packet injection.