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Efficient IBE with Tight Reduction to Standard Assumption in the Multi-challenge Setting
Identity based encryption Tight security Nested dual system group
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2016/12/9
In 2015, Hofheinz et al. [PKC, 2015] extended Chen and Wee's almost-tight reduction technique for identity based encryptions (IBE) [CRYPTO, 2013] to the multi-instance, multi-ciphertext (MIMC, or mult...
Concise Multi-Challenge CCA-Secure Encryption and Signatures with Almost Tight Security
CCA-secure encryption multi-user multi-challenge
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2016/1/7
To gain strong confidence in the security of a public-key scheme, it is most desirable for the
security proof to feature a tight reduction between the adversary and the algorithm solving the underlyi...