Revisit of chosen ciphertext secure public key encryption in standard model
نویسندگان
چکیده
We revisit the chosen ciphertext secure public key encryption schemes in standard model including Cramer-Shoup’s scheme(CS98) and KurosawaDesmedt’s scheme(KD04). We get the simplified version of CS98 and KD04. The simplified schemes are more efficient than the original schemes, and also provable secure against chosen ciphertext attack in standard model.
منابع مشابه
Chosen Ciphertext Secure Public Key Threshold Encryption Without Random Oracles
We present a non-interactive chosen ciphertext secure threshold encryption system. The proof of security is set in the standard model and does not use random oracles. Our construction uses the recent identity based encryption system of Boneh and Boyen and the chosen ciphertext secure construction of Canetti, Halevi, and Katz.
متن کاملA CCA2 Secure Public Key Encryption Scheme Based on the McEliece Assumptions in the Standard Model
We show that a recently proposed construction by Rosen and Segev can be used for obtaining the first public key encryption scheme based on the McEliece assumptions which is secure against adaptive chosen ciphertext attacks in the standard model.
متن کاملSimple and Efficient Public-Key Encryption from Computational Diffie-Hellman in the Standard Model
This paper proposes practical chosen-ciphertext secure public-key encryption systems that are provably secure under the computational Diffie-Hellman assumption, in the standard model. Our schemes are conceptually simpler and more efficient than previous constructions. We also show that in bilinear groups the size of the public-key can be shrunk from n to 2 √ n group elements, where n is the sec...
متن کاملChosen-Ciphertext Secure Key-Encapsulation Based on Gap Hashed Diffie-Hellman
We propose a practical key encapsulation mechanism with a simple and intuitive design concept. Security against chosen-ciphertext attacks can be proved in the standard model under a new assumption, the Gap Hashed Diffie-Hellman (GHDH) assumption. The security reduction is tight and simple. Secure key encapsulation, combined with an appropriately secure symmetric encryption scheme, yields a hybr...
متن کاملAn Efficient CCA2-Secure Variant of the McEliece Cryptosystem in the Standard Model
Recently, a few chosen-ciphertext secure (CCA2-secure) variants of the McEliece public-key encryption (PKE) scheme in the standard model were introduced. All the proposed schemes are based on encryption repetition paradigm and use general transformation from CPAsecure scheme to a CCA2-secure one. Therefore, the resulting encryption scheme needs separate encryption and has large key size compare...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006