What to do with Checksums
What is it?
Checksums are a way of ensuring that data has not been corrupted, either accidentally or maliciously. There are dozens of different types of checksums out there - MD5 is one of the most widespread and generally supported at the moment, and thus the one we're using on our website for our download files.
The checksum is calculated by applying an algorithm to every byte in the target file. The result is a string of hexadecimal digits which is (to a very high probability) unique to the file. By calculating the checksum on a copy of a file you've downloaded and comparing it to the checksum calculated by us prior to the transfer, you can check to see if a file has been corrupted on download before, say, writing it to DVD or trying to unpack it.
How Do I Find It?
Which software you use to calculate the MD5 checksum doesn't matter. Here are some commonly available routines we know about:
What Do I Do With It?
We generate the checksums for data file packages generated by our multi-mission search engine. When you download the data package, also download the associated MD5 checksum file. You then run your favorite MD5 routine on the package file you received and compare the resulting string to the checksum listed in our checksum file. If the strings are the same, you can unpack or burn the data knowing that at least the source file is clean and uncorrupted.
If the MD5 string is different, try downloading the file again. If you still can't match the checksum in our file, please let us know as soon as possible - the problem may be on our end.
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Keywords for Rings Node internal indexing: checksums md5