Checksum is probably good enough (1/256 chance of undetected change if done as an 8 bit ASCII checksum) especially if you also check file size. A CRC module would probably give you even more accurate results if you need to be that specific.

In reply to Re^2: How to check if a file is modified or missing on windows server using a perl script by marinersk
in thread How to check if a file is modified or missing on windows server using a perl script by crazy-duck

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