A "hash" (also called a "digest", and informally a "CheckSum") is a kind of "signature" for a stream of data that represents the contents. The closest real-life analog we can think is "a tamper-evident seal on a software package": if you open the Box (change the file), it's detected. Hash is used on the net to verify file integrity, and signing digital documents. With Hash - O - Matic you can calculate the hash of a file using multiple algorithms in no time.
Supported algorithms:
-CRC32
-GOST-Hash
-MD2
-MD4
-MD5
-SHA-1
-SHA-2 (256/384/512)
