@article{diffcaptchaanimagebasedcaptchawith,
  title = {Diff-CAPTCHA: An Image-based CAPTCHA with Security Enhanced by Denoising Diffusion Model},
  author = {Ran Jiang and Sanfeng Zhang and Linfeng Liu and Yanbing Peng},
  year = {2023},
  eprint = {2308.08367},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2308.08367v1},
}