Abstract:

The structure of public encryption key cannot meet the performance requisition for group key management based on onedecryptionkey oneencryptionkey algorithm. All group members need to  participate in rekeying if the public encryption key is updated. To solve the problem, a structured public encryption key is proposed.  Decryption keys are composed into a key set, any decryption key with key independence from the set has limited capability to modify the public encryption key, so  the rekeying implements successfully by selfconfiguration mode without support of powerful trusted entity, and the new public encryption key does not break the validity of other decryption key members. In this perspective, the proposed public encryption key structure enriches the relationship between decryption key and encryption key, and extends the key operations for dynamic groups. Besides, it is particularly adaptable to group key management of networks in harsh environment.

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