WorldCat Identities

Wen, Weiqiang

Overview
Works: 4 works in 4 publications in 1 language and 6 library holdings
Roles: Author, Other
Publication Timeline
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Most widely held works by Weiqiang Wen
Laser cooling and precision laser spectroscopy of highly charged ions at the storage ring CSRe and the future HIAF by Weiqiang Wen( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Theoretical study of the dielectronic recombination process of Li-like Xe51+ ions by Lijun Dou( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

Laser spectroscopy measurement of the 2s-hyperfine splitting in lithium-like bismuth( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Contributions to the hardness foundations of lattice-based cryptography by Weiqiang Wen( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Lattice-based cryptography is one of the most competitive candidates for protecting privacy, both in current applications and post quantum period. The central problem that serves as the hardness foundation of lattice-based cryptography is called the Learning with Errors (LWE). It asks to solve a noisy equation system, which is linear and over-determined modulo q. Normally, we call LWE problem as an average-case problem as all the coefficients in the equation system are randomly chosen modulo q. The LWE problem is conjectured to be hard even wtih a large scale quantum computer. It is at least as hard as standard problems defined in the lattices, such as Bounded Distance Decoding (BDD) and unique Shortest Vector Problem (uSVP). Finally, the best known algorithm for solving these problems is BKZ, which is very expensive. In this thesis, we study the quantum hardness of LWE, the hardness relations between the underlying problems BDD and uSVP, and the practical performance of the BKZ algorithm. First, we give a strong evidence of quantum hardness of LWE. Concretely, we consider a relaxed version of the quantum version of dihedral coset problem and show an computational equivalence between LWE and this problem. Second, we tighten the hardness relation between BDD and uSVP. More precisely, We improve the reduction from BDD to uSVP by a factor √2, compared to the one by Lyubashevsky and Micciancio. Third, we propose a more precise simulator for BKZ. In the last work, we propose the first probabilistic simulotor for BKZ, which can pridict the practical behavior of BKZ very precisely
 
Audience Level
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Audience Level
1
  Kids General Special  
Audience level: 0.95 (from 0.88 for Laser spec ... to 0.97 for Theoretica ...)

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