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Checksum Validator 1.0.0
Checksum Validator is a simple to use utility to calculate and validate checksums (SHA-1 or MD5 digests) for files that you download (or will upload).
By comparing a site's published checksum with your calculated checksum, you can verify that your download matches the site's "official" copy; free from corruption or tampering (unless the site's checksum was also tampered with). Everything needed to calculate checksums is in Mac OS X, this is just much easier and quicker, and let's face it, the easier and faster, the more likely we will actually verify our downloads.
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