Namhun Koo

According to our database, Namhun Koo authored at least 32 papers between 2011 and 2025.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2025

On the functions which are CCZ-equivalent but not EA-equivalent to quadratic functions over Fpn.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

Finite Fields Their Appl., 2025

2024

The second-order zero differential uniformity of the swapped inverse functions over finite fields.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

CoRR, 2024

Security Analysis of Reusing Vinegar Values in UOV Signature Scheme.

Namhun Koo, Kyung-Ah Shim

IEEE Access, 2024

2023

Low c-differential uniformity of the swapped inverse function in odd characteristic.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

Discret. Appl. Math., September, 2023

Investigations of <i>c</i>-differential uniformity of permutations with Carlitz rank 3.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

Finite Fields Their Appl., February, 2023

On non-monomial APcN permutations over finite fields of even characteristic.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

Finite Fields Their Appl., 2023

On the Functions Which are CCZ-equivalent but not EA-equivalent to Quadratic Functions over F_pⁿ.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

CoRR, 2023

cc-differential uniformity, (almost) perfect cc-nonlinearity, and equivalences.

Nhan-Phu Chung, Jaeseong Jeong, Namhun Koo, Soonhak Kwon

CoRR, 2023

2022

On Cryptographic Parameters of Permutation Polynomials of the form <i>x^rh</i>(<i>x</i>^{(2<i>ⁿ</i>-1)/<i>d</i>}).

Jaeseong Jeong, Chang Heon Kim, Namhun Koo, Soonhak Kwon, Sumin Lee

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., August, 2022

Efficient Implementations of Rainbow and UOV using AVX2.

Kyung-Ah Shim, Sangyub Lee, Namhun Koo

IACR Trans. Cryptogr. Hardw. Embed. Syst., 2022

On the boomerang uniformity of permutations of low Carlitz rank.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

Finite Fields Their Appl., 2022

Constructing differentially 4-uniform involutions over F22k by using Carlitz form.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

Finite Fields Their Appl., 2022

New differentially 4-uniform permutations from modifications of the inverse function.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

Finite Fields Their Appl., 2022

On non-monimial APcN permutations over finite fields of even characteristic.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

CoRR, 2022

Investigations of c-Differential Uniformity of Permutations with Carlitz Rank 3.

Jaeseong Jeong, Namhun Koo, Soonhak Kwon

CoRR, 2022

2020

Algebraic Fault Analysis of UOV and Rainbow With the Leakage of Random Vinegar Values.

Kyung-Ah Shim, Namhun Koo

IEEE Trans. Inf. Forensics Secur., 2020

A High-Speed Public-Key Signature Scheme for 8-b IoT-Constrained Devices.

Kyung-Ah Shim, Cheol-Min Park, Namhun Koo, Hwajeong Seo

IEEE Internet Things J., 2020

An Efficient MQ-Signature Scheme Based on Sparse Polynomials.

Kyung-Ah Shim, Cheol-Min Park, Namhun Koo

IEEE Access, 2020

2019

On cryptographic parameters of permutation polynomials of the form x^{rh(x^(q-1)/d)}.

Jaeseong Jeong, Chang Heon Kim, Namhun Koo, Soonhak Kwon, Sumin Lee

IACR Cryptol. ePrint Arch., 2019

On the Cipolla-Lehmer type algorithms in finite fields.

Gook Hwa Cho, Byeonghwan Go, Chang Heon Kim, Namhun Koo, Soonhak Kwon

Appl. Algebra Eng. Commun. Comput., 2019

2018

Side-Channel Attacks on Post-Quantum Signature Schemes based on Multivariate Quadratic Equations - Rainbow and UOV -.

Aesun Park, Kyung-Ah Shim, Namhun Koo, Dong-Guk Han

IACR Trans. Cryptogr. Hardw. Embed. Syst., 2018

2017

Cryptanalysis of RGB, a mixed multivariate signature scheme.

Kyung-Ah Shim, Cheol-Min Park, Namhun Koo

Finite Fields Their Appl., 2017

Security Analysis of Improved Cubic UOV Signature Schemes.

Kyung-Ah Shim, Namhun Koo, Cheol-Min Park

Proceedings of the Information Security and Cryptology - ICISC 2017 - 20th International Conference, Seoul, South Korea, November 29, 2017

An Existential Unforgeable Signature Scheme Based on Multivariate Quadratic Equations.

Kyung-Ah Shim, Cheol-Min Park, Namhun Koo

Proceedings of the Advances in Cryptology - ASIACRYPT 2017, 2017

2016

On r-th Root Extraction Algorithm in 𝔽_q for q≍lr^s+1;(mod; r^s+1) with 0<l<r and Small s.

Namhun Koo, Gook Hwa Cho, Soonhak Kwon

IEEE Trans. Computers, 2016

2015

New cube root algorithm based on the third order linear recurrence relations in finite fields.

Gook Hwa Cho, Namhun Koo, Eunhye Ha, Soonhak Kwon

Des. Codes Cryptogr., 2015

An Improvement of the Cipolla-Lehmer Type Algorithms.

Namhun Koo, Gook Hwa Cho, Byeonghwan Go, Soonhak Kwon

CoRR, 2015

2014

Remarks on the Pocklington and Padró-Sáez Cube Root Algorithm in 𝔽_q.

Geon Heo, Seokhwan Choi, Kwang Ho Lee, Namhun Koo, Soonhak Kwon

IACR Cryptol. ePrint Arch., 2014

2013

Square Root Algorithm in F_q for q≡2^s+1 (mod 2^s+1).

Namhun Koo, Gook Hwa Cho, Soonhak Kwon

IACR Cryptol. ePrint Arch., 2013

Trace Expression of r-th Root over Finite Field.

Gook Hwa Cho, Namhun Koo, Eunhye Ha, Soonhak Kwon

IACR Cryptol. ePrint Arch., 2013

New Cube Root Algorithm Based on Third Order Linear Recurrence Relation in Finite Field.

Gook Hwa Cho, Namhun Koo, Eunhye Ha, Soonhak Kwon

IACR Cryptol. ePrint Arch., 2013

2011

On Nonlinear Polynomial Selection and Geometric Progression (mod N) for Number Field Sieve.

Namhun Koo, Gooc Hwa Jo, Soonhak Kwon

IACR Cryptol. ePrint Arch., 2011