@article {15156,
	title = {Chosen-ciphertext security from identity-based encryption},
	journal = {SIAM Journal on Computing},
	volume = {36},
	year = {2007},
	month = {2007///},
	pages = {1301 - 1328},
	abstract = {We propose simple and efficient CCA-secure public-key encryption schemes (i.e., schemessecure against adaptive chosen-ciphertext attacks) based on any identity-based encryption (IBE)
scheme. Our constructions have ramifications of both theoretical and practical interest. First,
our schemes give a new paradigm for achieving CCA-security; this paradigm avoids {\textquotedblleft}proofs of
well-formedness{\textquotedblright} that have been shown to underlie previous constructions. Second, instantiating
our construction using known IBE constructions we obtain CCA-secure encryption schemes
whose performance is competitive with the most efficient CCA-secure schemes to date.
Our techniques extend naturally to give an efficient method for securing IBE schemes (even
hierarchical ones) against adaptive chosen-ciphertext attacks. Coupled with previous work, this
gives the first efficient constructions of CCA-secure IBE schemes.
},
	author = {Boneh,D. and Canetti,R. and Halevi,S. and Katz, Jonathan}
}
