hashsjekk
Hashsjekk is a method for verifying data integrity by computing a cryptographic hash of a file or message and comparing it with a reference value. A hash function converts input data of any size into a fixed-length string; small changes in the input produce a different hash, enabling detection of corruption or tampering.
Typically, a software distributor or data custodian provides the expected hash value for a file (a checksum).
Common hash algorithms include MD5, SHA-1, SHA-256, SHA-3, and BLAKE2. MD5 and SHA-1 are now considered weak
In practice, hash checks are widely used for software distribution, data backups, and file transfers. Tools