Anonymous traceable disclosure scheme using pairing over elliptic curve. - Tadahiko Ito; Takeshi Okamoto; Atsuo Inomata; Eiji Okamoto (InfoSecu, 2004)

Design and Analysis of "Flexible" k-out-of-n Signatures. - Raylin Tso; Xun Yi; Tadahiko Ito; Takeshi Okamoto; Eiji Okamoto (ATC, 2010)

Constructing the Cryptographic Boundaries for Lattice-based Cryptography on Hardware Security Module. - Junting Xiao; Tadahiko Ito (IACR Cryptol. ePrint Arch., 2020)

Clarifications for Elliptic Curve Cryptography Subject Public Key Information. - Tadahiko Ito; Sean Turner (RFC, 2020)

Clarifications for Ed25519, Ed448, X25519, and X448 Algorithm Identifiers. - Sean Turner; Simon Josefsson; Daniel McCarney; Tadahiko Ito (RFC, 2022)

X.509 Certificate General-Purpose Extended Key Usage (EKU) for Document Signing. - Tadahiko Ito; Tomofumi Okubo; Sean Turner (RFC, 2022)