Real Time Android Ransomware Detection by Analyzed Android Applications. - Ju-Seong Ko; Jeong-Seok Jo; Deuk-Hun Kim; SeulKi Choi; Jin Kwak (ICEIC, 2019)

Private Key Recovery on Bitcoin with Duplicated Signatures. - Ju-Seong Ko; Jin Kwak (KSII Trans. Internet Inf. Syst., 2020)