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Identity-Based Encryption with (Almost) Tight Security in the Multi-instance, Multi-ciphertext Setting
[chapter]
2015
Lecture Notes in Computer Science
We construct an identity-based encryption (IBE) scheme that is tightly secure in a very strong sense. Specifically, we consider a setting with many instances of the scheme and many encryptions per instance. In this setting, we reduce the security of our scheme to a variant of a simple assumption used for a similar purpose by Chen and Wee (Crypto 2013). The security loss of our reduction is O(k) (where k is the security parameter). Our scheme is the first IBE scheme to achieve this strong flavor
doi:10.1007/978-3-662-46447-2_36
fatcat:7ck25hyksjclpkumbqwpbuvnzi