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2. Message authentication code - Wikipedia

   en.wikipedia.org/wiki/Message_authentication_code

   The simplest such pairwise independent hash function is defined by the random key, key = (a, b), and the MAC tag for a message m is computed as tag = (am + b) mod p, where p is prime. More generally, k -independent hashing functions provide a secure message authentication code as long as the key is used less than k times for k -ways independent ...

3. Simple file verification - Wikipedia

   en.wikipedia.org/wiki/Simple_file_verification

   Simple file verification (SFV) is a file format for storing CRC32 checksums of files to verify the integrity of files. SFV is used to verify that a file has not been corrupted, but it does not otherwise verify the file's authenticity.

4. File verification - Wikipedia

   en.wikipedia.org/wiki/File_verification

   File verification is the process of using an algorithm for verifying the integrity of a computer file, usually by checksum.This can be done by comparing two files bit-by-bit, but requires two copies of the same file, and may miss systematic corruptions which might occur to both files.

5. File integrity monitoring - Wikipedia

   en.wikipedia.org/wiki/File_integrity_monitoring

   File integrity monitoring (FIM) is an internal control or process that performs the act of validating the integrity of operating system and application software files using a verification method between the current file state and a known, good baseline.

6. Checksum - Wikipedia

   en.wikipedia.org/wiki/Checksum

   This is especially true of cryptographic hash functions, which may be used to detect many data corruption errors and verify overall data integrity; if the computed checksum for the current data input matches the stored value of a previously computed checksum, there is a very high probability the data has not been accidentally altered or corrupted.

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