Small changes in the file produce very different looking checksums. The input file can be a small 1 MB file or a massive 4 GB file, but either way, you’ll end up with a checksum of the same length. The algorithm uses a cryptographic hash function that takes an input and produces a string (a sequence of numbers and letters) of a fixed length. Typical algorithms used for this include MD5, SHA-1, SHA-256, and SHA-512. ![]() ![]() To produce a checksum, you run a program that puts that file through an algorithm.
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