From: Phillip Gawlowski <cmdjackryan@...>
Date: 2008-05-13T13:26:19+09:00
Subject: Re: about writing file???

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Pat Kiatchaipipat wrote:
| hi, I have problem about writing file.
| I use this
|
| data = File.new("/options.sav","w")
|
| and I get file name option.sav in my path but when I open it with
| notepad. It can modify :'( I don't want this because options.sav has
| save data from my app that can't hack it! how can I write file with
| can't be modified???

You can't. All it needs is the correct privileges to access the file.

If you want the data to be somewhat tamper-proof, use encryption. Note,
though, that all it needs is the key to tamper with the file again. Or
you could obfuscate the file (ROT13, BASE64 encoding, what have you).
It'll be a loosing battle, though.

If you find a solution to this, the RIAA and MPAA, as well as SecuROM
would like to have a word with you, since you made DRM possible. ;)

- --
Phillip Gawlowski
Twitter: twitter.com/cynicalryan
Blog: http://justarubyist.blogspot.com

~   "Some things don't need the thought people give them."  -Hobbes
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