@article{mc2markdistortionfreemultibitwatermarkin,
  title = {MC$^2$Mark: Distortion-Free Multi-Bit Watermarking for Long Messages},
  author = {Xuehao Cui and Ruibo Chen and Yihan Wu and Heng Huang},
  year = {2026},
  eprint = {2602.14030},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2602.14030},
}