Powershell to encrypt text file with password or string

I'm running a shared computer with command prompt access, and I want to be able to encrypt and decrypt a text file from a powershell script, with a unique user-identified password. This way the file could not be opened without that password. I tried to use this module, however it seems to need something called a certificate. All I want is a powershell script that could be called with something like -Encrypt -File "Path\To\File" -Password -"12345" (and something similar to decrypt it). Does such a tool exist? If not, how would I go about doing this?

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1 Answer

This script from the PS gallery might do the trick;

UPDATE: the gallery has been removed. I cant find a migrated version anywhere but the webarchive has a copy:

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