To cite package ‘ciphertext’ in publications use:

Annicchiarico L (2025). ciphertext: Classical Cryptography Methods for Words and Phrases. R package version 0.2.0, https://github.com/luigi-annic/ciphertext.

Corresponding BibTeX entry:

  @Manual{,
    title = {ciphertext: Classical Cryptography Methods for Words and
      Phrases},
    author = {Luigi Annicchiarico},
    year = {2025},
    note = {R package version 0.2.0},
    url = {https://github.com/luigi-annic/ciphertext},
  }