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There is a program on your Mac that will do it.

Disk Utility will encrypt/decrypt folders. Take your text file and put in into a folder and launch Disk Utility. Select, Disk from Folder under File > New > Disk from Folder. You will be offered a couple of options. It will turn your Folder/file into an encrypted Disk Image.


Terry
 
Try Truecrypt

Truecrypt is open-source and is available for Mac, Windows and Linux.
 
Disk Utility will encrypt/decrypt folders. Take your text file and put in into a folder and launch Disk Utility. Select, Disk from Folder under File > New > Disk from Folder. You will be offered a couple of options. It will turn your Folder/file into an encrypted Disk Image.


Terry

Hello, I know that already but if I use it on and off like every day will it corrupt somehow?

I'm using it right now but I don't know if it is stable.

Kurutsu: I checked Truecrypt, seems really complicated, and no, I do not need to hide partitions. I only have a Windows and Mac partition.
 
If your needs are really simple, the Keychain Access app (Applications-->Utilities) has a secure notes function. Notetaking apps like Yojimbo and VoodooPad have encryption mechanisms as well.
 
If your needs are really simple, the Keychain Access app (Applications-->Utilities) has a secure notes function. Notetaking apps like Yojimbo and VoodooPad have encryption mechanisms as well.

Well the keychain thing won't work since I will upload it to a FTP as a backup and need the information encrypted.
 
I don't think that it may help you but it's worth mentioning it.

Check Hide Folder. It's a very easy to use app that can hide a folder. To unhide it, you need to run the app and then give the correct password.
 
Since you will be uploading stuff online... perhaps an encrypted disk image via Disk Utility would be the best container.
 
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