Advanced CheckSum Verifier - MD5 and SFV checksum utility for Windows home
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Advanced CheckSum Verifier - MD5 and SFV checksum utility for Windows

What is CRC32?

The CRC is acronym for "Cyclic Redundancy Code" and 32 represent the length of checksum in bits. The "CRC" term is reserved for algorithms that are based on the "polynomial" division idea. The idea to compute the checksum is equal for all CRC algorithms: Take the data as a VERY long binary number and divide it by a constant divisor. If you do this with integer values you get a rest; this rest is the CRC checksum (for example 7 / 3 = 2 + rest 1 => 1 is the checksum of 8. CRC is a family of algorithms and CRC32 is one certain member of this family (other members are CRC16, XMODEM,...); CRC32 produces a checksum with a length of 32 Bit (= 4Byte).

What is the "checksum"?

The checksum is a number that has been calculated as a function of some message. The literal interpretation of the "Check-Sum" word indicates that the function should make simply adding up the bytes in the message. Probably so was in the first checksum algorithms. Today, however, more sophisticated algorithms is used, but term "checksum" is still used.

What is the "message"?

The message in this context mean the input data, which will being checksummed. This usually is any sequence of bytes.

What is Advanced CheckSum Verifier (ACSV)?

The Advanced CheckSum Verifier is an small, GUI-driven Windows checksum utility intended for creation and verification the checksum files both in SFV and MD5SUM formats. ACSV will help Windows users to protect the integrity of their files by using the CRC32 or MD5 checksum calculation algorithms.

ACSV will useful when necessary to verify the accuracy of files burned to CD-R(W) or transmitted over network, or for files comparison, or for detection of corrupted or tampered files. Adding an little checksum file to your data files will allow easily to verify their integrity at any time in further and allow you to reveal what files has been changed.

ACSV is especially effective if you have many files, many subdirectories, or both. And it's extremely fast and lightweight.

ACSV uses checksum files fully compatible with popular md5 utility for MD5 and SFV (Simple File Verification) for CRC32.

Read more about ACSV
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Download! - 349Kb EXE-file with installer

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© Last modified: Last modified:    November 30, 2006 

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