Continuous Leakage-Resilient Public-Key Encryption Scheme with CCA Security
نویسندگان
چکیده
منابع مشابه
New leakage-resilient CCA-secure public key encryption
This paper shows a generic method of constructing CCAsecure public key encryption schemes with leakage resilience on the secret key. It is based on a new kind of universal2 hash proof system which accepts an auxiliary parameter. Specifically, two schemes are presented, basing on the DCR assumption and DLIN assumption respectively.
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The literature on leakage-resilient cryptography contains various leakage models that provide different levels of security. In this work, we consider the bounded leakage and the continual leakage models. In the bounded leakage model (Akavia et al. – TCC 2009), it is assumed that there is a fixed upper bound L on the number of bits the attacker may leak on the secret key in the entire lifetime o...
متن کاملDefinition of Leakage-resilient Cca Encryption
Key Generation The challenger computes (pk, sk) ← Gen(1λ) and give pk to A. Test 1: The adversaryA (adaptively) submits decryption queries Ci and getsmi = Dsk(Ci). The adversary also (adaptviely) submits leakage queries fj : {0, 1} ∗ → {0, 1}lj and gets fj(sk). Challenge: The adversary A comes up with two message m0, m1. The challenger chooses a random bit b ← {0, 1} and gives A the value C∗ = ...
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In threshold public-key encryption, the decryption key is divided into n shares, each one of which is given to a different decryption user in order to avoid single points of failure. In this study, we propose a simple and efficient non-interactive threshold publickey encryption scheme by using the hashed Diffie-Hellman assumption in bilinear groups. Compared with the other related constructions...
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ژورنال
عنوان ژورنال: The Computer Journal
سال: 2017
ISSN: 0010-4620,1460-2067
DOI: 10.1093/comjnl/bxw110