Preventing the Access of Fraudulent WEB Sites by Using a Special Two-Dimensional Code. - Nobuyuki Teraura; Kouichi Sakurai (IMIS, 2012)

Information Hiding of Two-dimensional Code by Multi-layer Optical. - Nobuyuki Teraura; Kouichi Sakurai (ISPA, 2012)

Confidentiality of 2D Code using Infrared with Cell-level Error Correction. - Nobuyuki Teraura; Kouichi Sakurai (Int. J. Interact. Multim. Artif. Intell., 2013)

Evaluation of the Identity and Compatibility of Multi-valued Cells in Two-Dimensional Codes Using Smartphones. - Nobuyuki Teraura; Kouichi Sakurai (SOCA, 2014)

Proposal of multi-value cell structure for high-density two-dimensional codes and evaluation of readability using smartphones. - Nobuyuki Teraura; Kouichi Sakurai (NTMS, 2015)

Evaluation of gamma ray durability of RF tag and application to the radiation environment. - Nobuyuki Teraura; Kunio Ito; Daisuke Kobayashi; Kouichi Sakurai (RFID-TA, 2015)

Counterfeit Detection by Smartphone Using Double-Encoded Two-Dimensional Code. - Nobuyuki Teraura (IMIS, 2017)

Implementation of a Digital Signature in Backward-Compatible QR Codes Using Subcell Division and Double Encoding. - Nobuyuki Teraura; Isao Echizen; Keiichi Iwamura (IMIS, 2019)

A QR Symbol with ECDSA for Both Public and Secret Areas using Rhombic Sub-cells. - Nobuyuki Teraura; Isao Echizen; Keiichi Iwamura (APSIPA, 2020)

Implementation of Digital Signature on QR Symbol by Area Division Using Rhombic Sub-cells. - Nobuyuki Teraura; Isao Echizen; Keiichi Iwamura (IMIS, 2020)

Round Color 2D Symbol with Display Area and Secret Data Area for Business-to-Consumer Applications. - Nobuyuki Teraura; Isao Echizen; Keiichi Iwamura (GCCE, 2022)