Black-Box Separations on Fiat-Shamir-Type Signatures in the Non-Programmable Random Oracle Model

2015 ◽  
pp. 3-20 ◽  
Author(s):  
Masayuki Fukumitsu ◽  
Shingo Hasegawa
Keyword(s):  
Random Oracle Model ◽  
Random Oracle ◽  
Black Box

Black-Box Separations of Hash-and-Sign Signatures in the Non-Programmable Random Oracle Model

2015 ◽  
pp. 435-454 ◽  
Author(s):  
Zongyang Zhang ◽  
Yu Chen ◽  
Sherman S. M. Chow ◽  
Goichiro Hanaoka ◽  
Zhenfu Cao ◽  
...  
Keyword(s):  
Random Oracle Model ◽  
Random Oracle ◽  
Black Box

scholarly journals An Identity-Based Blind Signature Scheme Using Lattice with Provable Security

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Quanrun Li ◽  
Chingfang Hsu ◽  
Debiao He ◽  
Kim-Kwang Raymond Choo ◽  
Peng Gong
Keyword(s):  
Quantum Computer ◽  
Rapid Development ◽  
Random Oracle Model ◽  
Random Oracle ◽  
Mean Value ◽  
Blind Signature ◽  
Signature Scheme ◽  
Practical Applications ◽  
Universal Quantum ◽  
Identity Based

With the rapid development of quantum computing and quantum information technology, the universal quantum computer will emerge in the near decades with a very high probability and it could break most of the current public key cryptosystems totally. Due to the ability of withstanding the universal quantum computer’s attack, the lattice-based cryptosystems have received lots of attention from both industry and academia. In this paper, we propose an identity-based blind signature scheme using lattice. We also prove that the proposed scheme is provably secure in the random oracle model. The performance analysis shows that the proposed scheme has less mean value of sampling times and smaller signature size than previous schemes. Thus, the proposed scheme is more suitable for practical applications.

scholarly journals ID-based key-insulated signcryption with equality test in cloud computing

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Seth Alornyo ◽  
Kingsford Kissi Mireku ◽  
Mustapha Adamu Mohammed ◽  
Daniel Adu-Gyamfi ◽  
Michael Asante
Keyword(s):  
Cloud Computing ◽  
Random Oracle Model ◽  
Random Oracle ◽  
Harsh Environments ◽  
Secret Key ◽  
Secret Keys ◽  
Security Property ◽  
Equality Test ◽  
Chosen Ciphertext Attack ◽  
Chosen Message Attack

AbstractKey-insulated encryption reduces the problem of secret key exposure in hostile setting while signcryption cryptosystem attains the benefits of digitally signing a ciphertext and public key cryptosystem. In this study, we merge the primitives of parallel key-insulation cryptosystem and signcryption with equality test to construct ID-based parallel key-insulated signcryption with a test for equality (ID-PKSET) in cloud computing. The construction prevent data forgery, data re-play attacks and reduces the leakage of secret keys in harsh environments. Our scheme attains the security property of existential unforgeable chosen message attack (EUF-CMA) and indistinquishable identity chosen ciphertext attack (IND-ID-CCA2) using random oracle model.

Tighter Security Proofs for GPV-IBE in the Quantum Random Oracle Model

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Shuichi Katsumata ◽  
Shota Yamada ◽  
Takashi Yamakawa
Keyword(s):  
Random Oracle Model ◽  
Random Oracle ◽  
Security Proofs

Tighter Proofs of CCA Security in the Quantum Random Oracle Model

2019 ◽  
pp. 61-90 ◽  
Author(s):  
Nina Bindel ◽  
Mike Hamburg ◽  
Kathrin Hövelmanns ◽  
Andreas Hülsing ◽  
Edoardo Persichetti
Keyword(s):  
Random Oracle Model ◽  
Random Oracle
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