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What is CRC32?

April 26, 2017crc32

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What is CRC32?

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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).