To cite package ‘cyphr’ in publications use:

  FitzJohn R (2024). _cyphr: High Level Encryption Wrappers_. R package
  version 1.1.5, , <https://github.com/ropensci/cyphr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {cyphr: High Level Encryption Wrappers},
    author = {Rich FitzJohn},
    year = {2024},
    note = {R package version 1.1.5, 
},
    url = {https://github.com/ropensci/cyphr},
  }