Tightly-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model

2018 ◽  
pp. 520-551 ◽  
Author(s):  
Tsunekazu Saito ◽  
Keita Xagawa ◽  
Takashi Yamakawa
Keyword(s):  
Random Oracle Model ◽  
Random Oracle ◽  
Key Encapsulation Mechanism

scholarly journals Heterogeneous deniable authenticated encryption for location-based services

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0244978
Author(s):  
Chunhua Jin ◽  
Ge Kan ◽  
Guanhua Chen ◽  
Changhui Yu ◽  
Ying Jin ◽  
...  
Keyword(s):  
Location Privacy ◽  
Random Oracle Model ◽  
Random Oracle ◽  
Location Based Services ◽  
Authenticated Encryption ◽  
Security Proof ◽  
Current Location ◽  
Key Encapsulation Mechanism ◽  
Identity Based ◽  
Encryption Method

The location-based services can provide users with the requested location information. But users also need to disclose their current location to the location-based service provider. Therefore, how to protect user’s location privacy is a major concern. In this paper, we propose a heterogeneous deniable authenticated encryption scheme called HDAE for location-based services. The proposed scheme permits a sender in a public key infrastructure environment to transmit a message to a receiver in an identity-based environment. Our design utilizes a hybrid encryption method combing the tag-key encapsulation mechanism (tag-KEM) and the data encapsulation mechanism (DEM), which is well adopted for location-based services applications. We give how to design an HDAE scheme utilizing a heterogeneous deniable authenticated tag-KEM (HDATK) and a DEM. We also construct an HDATK scheme and provide security proof in the random oracle model. Comprehensive analysis shows that our scheme is efficient and secure. In addition, we give an application of the HDAE to a location-based services system.

scholarly journals DAGS: Key encapsulation using dyadic GS codes

2018 ◽  
Vol 12 (4) ◽  
pp. 221-239 ◽  
Author(s):  
Gustavo Banegas ◽  
Paulo S. L. M. Barreto ◽  
Brice Odilon Boidje ◽  
Pierre-Louis Cayrel ◽  
Gilbert Ndollane Dione ◽  
...  
Keyword(s):  
Quantum Cryptography ◽  
Random Oracle Model ◽  
Random Oracle ◽  
Competitive Performance ◽  
Key Encapsulation Mechanism ◽  
Post Quantum Cryptography ◽  
Areas Of Interest ◽  
Code Based Cryptography

Abstract Code-based cryptography is one of the main areas of interest for NIST’s Post-Quantum Cryptography Standardization call. In this paper, we introduce DAGS, a Key Encapsulation Mechanism (KEM) based on quasi-dyadic generalized Srivastava codes. The scheme is proved to be IND-CCA secure in both random oracle model and quantum random oracle model. We believe that DAGS will offer competitive performance, especially when compared with other existing code-based schemes, and represent a valid candidate for post-quantum standardization.

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.

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