A Generic Construction from Selective-IBE to Public-Key Encryption with Non-interactive Opening
Public-key encryption schemes with non-interactive opening (PKENO) allow a receiver who received a ciphertext c to non-interactively convince third parties that the decryption of c is what he has claimed, without compromising the scheme’s security. In this work, we present a generic construction from identity-based encryption scheme, which is secure against selective-ID and chosen plaintext attack (IND-sID-CPA), to PKENO with chameleon hash instead of the one-time signature technology. Our construction gives new view of IBE-to-PKENO technique, and some previously known PKENO schemes can be viewed as concrete instantiations of our generic construction. At last, we also give a new instantiation, which is (slightly) more efficient than the best known scheme .
KeywordsGeneric Construction Random Oracle Model Identity Base Encryption Random Coin Collision Resistance
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