Ask HN: What encryption do you use to send files to unsophisticated parties?

I'm keen to understand people's solutions for sending sensitive data (e.g. CSVs, PDF docs) to third party organisations that can only be assumed to have standard (MS Windows / MS Office) tools at their disposal for decryption.

I'm keen for encryption to be of a modern, robust standard, and preferably available via mac / unix tools.

Thanks HN!

However my unsophisticated parties are really too unsophisticated or too lazy so I send it in clear.

This is why you will not find a comment from me throwing stones at Equifax or other orgs that had breach.