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Quantum Attacks without Superposition Queries: the Offline Simon Algorithm
Simon's algorithm classical queries symmetric cryptography
2019/6/4
In symmetric cryptanalysis, the model of superposition queries has lead to surprising results, with many constructions being broken in polynomial time thanks to Simon's period-finding algorithm. But t...
Quantum Attacks against Indistinguishablility Obfuscators Proved Secure in the Weak Multilinear Map Model
Cryptanalysis Obfuscation
2018/6/5
We present a quantum polynomial time attack against the GMMSSZ branching program obfuscator of Garg et al. (TCC'16), when instantiated with the GGH13 multilinear map of Garg et al. (EUROCRYPT'13). Thi...
Quantum Attacks on Some Feistel Block Ciphers
Quantum key-recovery attack Symmetric cipher
2018/5/28
Post-quantum cryptography has attracted much attention from worldwide cryptologists. However, most research works are related to public-key cryptosystem due to Shor's attack on RSA and ECC ciphers. At...
Quantum Attacks on Classical Proof Systems - The Hardness of Quantum Rewinding
Quantum cryptography proofs of knowledge rewinding
2016/1/23
Quantum zero-knowledge proofs and quantum proofs of knowledge are inherently difficult to analyze because their security analysis uses rewinding. Certain cases of quantum rewinding are handled by th...
Efficient Statistical Zero-Knowledge Authentication Protocols for Smart Cards Secure Against Active & Concurrent Quantum Attacks
Authentication Smart Cards
2014/3/6
In this paper, we construct two statistical zero-knowledge authentication protocols for smart cards based on general assumptions. The first protocol can only resist active attacks, where the smart car...
A Perfectly Binding Commitment Scheme Against Quantum Attacks
secret-key cryptography / commitment scheme lattice quantum attack
2012/3/28
It's known that perfectly binding quantum computationally hiding commitment schemes can be constructed from any quantum one-way permutation. Since no quantum one-way permutations are known, it has bee...