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Security Education Companion
A free resource for digital security educators

File fingerprint

A sequence or letters or numbers that represent the contents of a file. Changing the file even a tiny bit will completely change its fingerprint. Checking the fingerprint of a file that you've downloaded, such as a software application or extension, helps to make sure that you got the same file that other people have, and that nobody has tampered with it while it was being downloaded.

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