CCA-Secure Unidirectional Proxy Broadcast Re-Encryption in the Standard Model

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Provided by: Binary Information Press
Topic: Security
Format: PDF
Considering constructs a chosen-ciphertext secure unidirectional PRE in the adaptive corruption model is still an important question and the broadcast encryption with wide applications in the real world, the first CCA-secure unidirectional Proxy Broadcast Re-Encryption (PBRE) scheme was proposed under the standard model. By using a new ciphertext component in the authors' scheme, the challenger enable to successfully generate the challenge ciphertext for the adversary, even if the adversary is allowed to adaptively corrupt users.
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