New techniques for dual system encryption and fully secure HIBE with short ciphertexts
作者： Allison Lewko , Brent Waters
DOI: 10.1007/978-3-642-11799-2_27
关键词:
摘要: We construct a fully secure HIBE scheme with short ciphertexts. The previous construction of Boneh, Boyen, and Goh was only proven to be in the selective model, under non-static assumption which depended on depth hierarchy. To obtain full security, we apply dual system encryption concept recently introduced by Waters. A straightforward application this technique is insufficient achieve ciphertexts, since original instantiation includes tags that do not compress. overcome challenge, design new method for realizing encryption. provide composite order groups (of three primes) prove security our static assumptions.
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sci-hub.st 参考文章(22)
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