The md5sum utility is used to calculate what is called the fingerprint of a file. A small tutorial for the program "md5" or "md5sum" commonly called "checksum". (The checksum is a value of 128 bits ...

An MD5 sum is a string of letters and numbers that acts like a fingerprint for a file. If two files have the same MD5 sum, the files are exactly alike - which is why MD5 "fingerprints" can verify ...

So if you think comparing an MD5 is difficult, check out the thread. It’s argued that GUI MD5 checkers are easier to use than the command-line application, but really, if you can type, it doesn’t get ...

The sender’s unique information should be used in a signature; It should be easy to create a signature; It should be impossible to falsify a signature computationally; A signature should be small.