CSV files are plain text. They can be opened in any text editor (notepad, for
example).

If you really want to protect it, maybe you can zip it with a password or use an
encryption program (I bet google can find tons).

Stu Campbell wrote:

I have an excel file in CSV format. I would like to require a password to
open file (save as, tools, general options, input password). Can you do this
with CSV format? This works for me obviously with standard excel file but a
CSV format this option becomes greyed out.
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SAC

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Dave Peterson