On the use of ECDSA with hierarchical public key delegation in identity-based scenarios. - Lucas C. Cardoso; Marcos A. Simplício Jr. (IACR Cryptol. ePrint Arch., 2025)

Introducing two ROS attack variants: breaking one-more unforgeability of BZ blind signatures. - Bruno M. F. Ricardo; Lucas C. Cardoso; Leonardo T. Kimura; Paulo S. L. M. Barreto; Marcos A. Simplício Jr. (IACR Cryptol. ePrint Arch., 2025)