Conversation key safety distributing method under wireless environment

Abstract

This invention discloses one dispatch method on meet keys on wireless environment, which comprises the following steps: a, sending dialogue keys and sending the keys type in symmetric type or not to the mobile point STA and interface point AP by the reliable third part identification server ASU; b, establishing mobile joint STA and interface joint AP common keys to receive identification server ASU message and the testing the authorization message to get the meet keys and moving joint STA and receiving the transferred information and testing the message codes and using the mobile joint STA and identification server ASU common keys to decode the message to get the dialogue keys.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a security technology of a wireless local area network, in particular to a key distribution method suitable for a wireless environment, which is used for establishing a key when a mobile device accesses a wireless local area network. Background technique [0002] Wireless LAN can provide users with great flexibility. However, since the commercial application of wireless local area network, the security problem has become the main restrictive factor restricting its further development. At present, IEEE 802.11 wireless local area network adopts the method based on wired equivalent privacy WEP to control the secure access of wireless terminals and keep data confidential on wireless links. Generally speaking, security access control is implemented by means of authentication, and data security is implemented by methods such as encryption and integrity. However, data secu...

AI Technical Summary

Problems solved by technology

The protocol authentication part and key agreement part are logically independent. Although it has certain advantages in key update, there are still obvious defects. For example, the key agreement protocol of the protocol cannot resist unknown key sharing attacks; The identity authentication function of the access node AP to the mobile node STA; the mobile node STA is allowed to access the network without completing the identity authentication; the mobile node STA and the wireless access node AP may generate different session keys, so that the protocol fail

[0011] The common deficiencies of the above-mentioned key agreement protocols are: (1) low execution efficiency, involving too many public key calculations, which require a large amount of calculation for mobile terminals; (2) too many exchange rounds of the protocol , not suitable for use in a wireless environment; (3) failed to give a convincing security proof, its security is questionable, and cannot fully meet the security requirements of the wireless environment

The biggest shortcoming of the 3PKD protocol is that the security is not high enough, it does not have the ability to resist the adaptive chosen ciphertext attack CCA2, and it is not suitable for use in special wireless environments

In addition, the way of maintaining synchronized data between the mobile terminal and the home environment also makes the implementation of the authentication and key agreement mechanism extremely difficult

Therefore, the security of the authentication and key agreement mechanism cannot be guaranteed, and it is not suitable for use in special environments under wireless

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