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Post-Quantum Variants of ISO/IEC Standards: Compact Chosen Ciphertext Secure Key Encapsulation Mechanism from Isogenies
Post-quantum cryptosystems Isogeny-based cryptosystems CSIDH
2019/9/17
ISO/IEC standardizes several chosen ciphertext-secure key encapsulation mechanism (KEM) schemes in ISO/IEC 18033-2. However, all ISO/IEC KEM schemes are not quantum resilient. In this paper, we introd...
On the non-tightness of measurement-based reductions for key encapsulation mechanism in the quantum random oracle model
non-tightness quantum random oracle model Fujisaki-Okamoto
2019/5/21
Key encapsulation mechanism (KEM) variants of the Fujisaki-Okamoto (FO) transformation (CRYPTO 1999 and Journal of Cryptology 2013) that turn a weakly-secure public-key encryption (PKE) into an IND-CC...
Tighter security proofs for generic key encapsulation mechanism in the quantum random oracle model
quantum random oracle model key encapsulation mechanism generic construction
2019/2/27
In (TCC 2017), Hofheinz, Hoevelmanns and Kiltz provided a fine-grained and modular toolkit of generic key encapsulation mechanism (KEM) constructions, which were widely used among KEM submissions to N...
Key Encapsulation Mechanism with Explicit Rejection in the Quantum Random Oracle Model
quantum random oracle model key encapsulation mechanism explicit rejection
2019/1/26
The recent post-quantum cryptography standardization project launched by NIST increased the interest in generic key encapsulation mechanism (KEM) constructions in the quantum random oracle (QROM). Bas...
Understanding and Constructing AKE via Double-key Key Encapsulation Mechanism
Authenticated Key Exchange CK Model Key Encapsulation Mechanism
2018/11/19
Motivated by abstracting the common idea behind several implicitly authenticated key exchange (AKE) protocols, we introduce a primitive that we call double-key key encapsulation mechanism (2-key KEM)....
(Tightly) QCCA-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model
Tight security quantum chosen-ciphertext security post-quantum cryptography
2018/11/16
This paper shows the security against quantum chosen-ciphertext attacks (QCCA security) of the KEM in Saito, Yamakawa, and Xagawa (EUROCRYPT 2018) in the QROM. The proof is very similar to that for th...
Using MILP in Analysis of Feistel Structures and Improving Type II GFS by Switching Mechanism
MILP Generalized Feistel structure Switching mechanism
2018/8/16
Some features of Feistel structures have caused them to be considered as an efficient structure for design of block ciphers. Although several structures are proposed relied on Feistel structure, the t...
Tightly-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model
Tight security chosen-ciphertext security post-quantum cryptography
2017/10/16
We give a first tight security reduction for a conversion from a weakly secure public-key encryption scheme to an IND-CCA-secure key-encapsulation mechanism scheme in the quantum random oracle model. ...
Evidence-Based Trust Mechanism Using Clustering Algorithms for Distributed Storage Systems
trust management social secret sharing applied cryptography
2017/8/1
In distributed storage systems, documents are shared among multiple Cloud providers and stored within their respective storage servers. In social secret sharing-based distributed storage systems, shar...
Estonian Voting Verification Mechanism Revisited Again
Electronic voting vote verification
2017/2/20
Recently, Muş, Kiraz, Cenk and Sertkaya proposed an improvement over the present Estonian Internet voting vote verification scheme. This paper points to the weaknesses and questionable design cho...
Algorithmic Mechanism Construction bridging Secure Multiparty Computation and Intelligent Reasoning
Algorithmic mechanism Intelligent reasoning Threat analytics
2016/12/10
This work presents the construction of intelligent algorithmic mechanism based on multidimensional view of intelligent reasoning, threat analytics, cryptographic solutions and secure multiparty comput...
After the Estonian Parliamentary Elections held in 2011, an additional veri cation mechanism was integrated into the i-voting system in order to resist corrupted voting devices, including the so calle...
Implementation and Evaluation of a Leakage-Resilient ElGamal Key Encapsulation Mechanism
implementation Leakage-resilient cryptography
2016/1/6
Leakage-resilient cryptography aims to extend the rigorous
guarantees achieved through the provable security paradigm to physical
implementations. The constructions and mechanisms designed on basis
...
TRACING ATTACKS ON U-PROVE WITH REVOCATION MECHANISM
anonymous credential U-Prove revocation
2016/1/4
Anonymous credential systems have to provide strong privacy protection:
a user may prove his (chosen) attributes without leaking
neither his identity nor other attributes. In this paper we consider
...
Financial Cryptography: Discriminatory Pricing Mechanism
Financial cryptography pricing mechanism secure function decomposition
2015/12/31
This work presents an adaptive profitable discriminatory pricing mechanism for cloud computing based on secure function decomposition, cryptographic commitments and zero knowledge proof. Cloud computi...