IACR Cryptology ePrint Archive · 2005 · 34 citations · 3 references
ComputingComputer ScienceAuthenticationCryptographyFormal MethodsCertificate-based AuthenticationClassical CryptographyCryptographic AlgorithmsElliptic Curve CryptographyPublic-key CryptographyCertificateless CryptographyEncryption Scheme Security ProofsPublic-key EncryptionSecurity Reductions
Recently, Al-Riyami and Paterson proposed a generic conversion from CL-PKE (Certificateless Public Key Encryption) to CBE (Certificate Based Encryption) and claimed that the derived CBE scheme is secure and even more efficient than the original scheme of Gentry. In this paper, we show that their conversion is wrong due to the flaw of the security proof. It leads the new concrete CBE scheme by Al-Riyami and Paterson to be invalidated. In addition, our result supports the impossibility to relate both notions in any directions.
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Identity-Based Encryption from the Weil Pairing
Dan Boneh, Matthew Franklin · SIAM Journal on Computing · 2003 · 3.6K citations