TY - JOUR
T1 - Chosen-ciphertext security from identity-based encryption
AU - Boneht, Dan
AU - Canetti, Ran
AU - Halevi, Shai
AU - Katz, Jonathan
PY - 2006
Y1 - 2006
N2 - We propose simple and efficient CCA-secure public-key encryption schemes (i.e., schemes secure 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 "proofs of wellformedness" 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.
AB - We propose simple and efficient CCA-secure public-key encryption schemes (i.e., schemes secure 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 "proofs of wellformedness" 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.
KW - Chosen-ciphertext security
KW - Identity-based encryption
KW - Public-key encryption
UR - http://www.scopus.com/inward/record.url?scp=33745854208&partnerID=8YFLogxK
U2 - 10.1137/S009753970544713X
DO - 10.1137/S009753970544713X
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AN - SCOPUS:33745854208
SN - 0097-5397
VL - 36
SP - 1301
EP - 1328
JO - SIAM Journal on Computing
JF - SIAM Journal on Computing
IS - 5
ER -