Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption

  title={Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption},
  author={Allison Bishop and Tatsuaki Okamoto and Amit Sahai and Katsuyuki Takashima and Brent Waters},
In this paper, we present two fully secure functional encryption schemes. Our first result is a fully secure attribute-based encryption (ABE) scheme. Previous constructions of ABE were only proven to be selectively secure. We achieve full security by adapting the dual system encryption methodology recently introduced by Waters and previously leveraged to obtain fully secure IBE and HIBE systems. The primary challenge in applying dual system encryption to ABE is the richer structure of keys and… CONTINUE READING
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