FIELD: information technology.
SUBSTANCE: method includes the following steps: sending, by an Authenticator Entity (AE), a new unicast key negotiation request packet to an Authentication Supplicant Entity (ASUE), wherein the new unicast key negotiation request packet is formed by adding a Message Integrity Code (MIC) to the primary definition content of a unicast key negotiation request packet; verifying, by the ASUE, whether the MIC contained in the new unicast key negotiation request packet is correct on reception of the new unicast key negotiation request packet; if the MIC is not correct, discarding the new unicast key negotiation request packet; if the MIC is correct, verifying, by the AE, the unicast key negotiation request packet, and sending a unicast key negotiation response packet to the AE if the verification is successful.
EFFECT: eliminating DoS attacks, where unicast key negotiation request packets are imitated and repeatedly transmitted.
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