SFV

From Wikipedia, the free encyclopedia

SFV is an abbreviation for simple file verification, a file format for storing CRC32 checksums of files in order to verify the integrity of files.

[edit] Check sum

Files can become corrupted for a variety of reasons including: faulty storage media, errors in transmission, write errors during copying or moving, and so on. SFV allows a person to ensure that a file has not become corrupted by comparing a hash applied to a file to see that they are equal. SFV also allows users to verify the authenticity of files, since if a file was changed (say, with the addition of malicious code) the hash 'fingerprint' of the file would change and alert the user that the authenticity of the file is in question.

One of the first programs to use the SFV format was WinSFV.

SFV uses a plain-text file containing one line for each file and its checksum in the format FILENAME CHECKSUM. Any line starting with a semicolon ';' is considered to be a comment line and is ignored for the purposes of file verification. A sample SFV file appears as follows:

file1.zip c45ad668
file2.zip 7903b8e6
file3.zip e99a65fb

[edit] External links

• RapidCRC checking and creating CRC32 and MD5 checksums
• QuickSFV
• Check SFV
• wxChecksums (for SFV & MD5)
• WinSFV FAQ (mostly in Dutch)
• Pure-SFV (and PAR)
• QuickPar (mainly for PAR2, but can also check (not create) SFV)
• MacSFV (For Mac, can create and read SFV)
• SuperSFV For Mac OSX
• fsum
• DySFV Built in C#, searches for and checks multiple sfv files.
• Checknorris SFV Utility Eclipse RCP-based
• HKsfv CRC-32 and MD5
• cSFV