A SNMPv3 Replay Protection Scheme Used in Space Network Based on Random Number

The user-based security model and its replay protection principium are firstly introduced and then a replay protection scheme based on random number is proposed to avoid baleful replay attack because of the inefficiency of the USM. A random number is used as the authentication between manager and agent in this scheme, and the number is changed on each message exchange to ensure the agent can identify the response message. The scheme is tested in the simulation platform by using SNMP4j and Jpcap. Test result shows that the performance of the network management system based on this scheme is affected a little under replay attack.