Summary

Checksums are short codes computed from input data. A checksum helps confirm data_integrity after transfer or storage. An algorithm or hash_function processes bytes and outputs a fixed-size number. Common examples include crc32 and adler32. You compare the sender's value to the receiver's value. If they differ, an error_detection event is flagged. Checksums can have a collision, so they are not for security. Cryptographic hashes like sha256 support integrity with authentication.