Adaptable key-policy attribute-based encryption with timeinterva
Siqi Ma1 - Personal Name
unzuo Lai2 - Personal Name
Robert H - Personal Name
Deng1 - Personal Name
Xuhua Ding - Personal Name
In this paper, we introduce a new cryptographicprimitive:adaptableKP-ABEwithtimeinterval(KP-TIABE),which is an extension of key-policy attribute-based encryp-tion(KP-ABE).AdaptableKP-TIABEspecifiesadecryptiontime interval for every ciphertext such that the ciphertextcan only be decrypted within this time interval. To be moreflexible,thedecryptiontimeintervalassociatedwithacipher-text can be adjusted on demand by a semi-trusted server. Wepropose a formal model for adaptable KP-TIABE, present aconcrete adaptable KP-TIABE scheme and prove its securityunder the security model
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