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  2. cksum - Wikipedia

    en.wikipedia.org/wiki/Cksum

    cksum is a command in Unix and Unix-like operating systems that generates a checksum value for a file or stream of data. The cksum command reads each file given in its arguments, or standard input if no arguments are provided, and outputs the file's 32-bit cyclic redundancy check (CRC) checksum and byte count. [1]

  3. File verification - Wikipedia

    en.wikipedia.org/wiki/File_verification

    Several utilities, such as md5deep, can use such checksum files to automatically verify an entire directory of files in one operation. The particular hash algorithm used is often indicated by the file extension of the checksum file. The ".sha1" file extension indicates a checksum file containing 160-bit SHA-1 hashes in sha1sum format.

  4. 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. The .sfv file extension is usually used for SFV files. [1]

  5. 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.

  6. md5sum - Wikipedia

    en.wikipedia.org/wiki/Md5sum

    The MD5 hash functions as a compact digital fingerprint of a file. As with all such hashing algorithms, there is theoretically an unlimited number of files that will have any given MD5 hash. However, it is very unlikely that any two non-identical files in the real world will have the same MD5 hash, unless they have been specifically created to ...

  7. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Windows Event Viewer file format 45 6C 66 46 69 6C 65: ElfFile: 0 evtx Windows Event Viewer XML file format 73 64 62 66: sdbf: 8 sdb Windows customized database 50 4D 43 43: PMCC: 0 grp Windows 3.x Program Manager Program Group file format 4B 43 4D 53: KCMS: 0 icm ICC profile: 72 65 67 66: regf: 0 dat hiv Windows Registry file 21 42 44 4E!BDN ...

  8. File signature - Wikipedia

    en.wikipedia.org/wiki/File_signature

    File magic number: bytes within a file used to identify the format of the file; generally a short sequence of bytes (most are 2-4 bytes long) placed at the beginning of the file; see list of file signatures; File checksum or more generally the result of a hash function over the file contents: data used to verify the integrity of the file ...

  9. 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.