Fletcher's Checksum - Fletcher-32

Fletcher-32

When the data word is divided into 16 bit blocks, two 16-bit sums result and are combined into a 32-bit Fletcher checksum. Usually, the second sum will be multiplied by 216 and added to the simple checksum, effectively stacking the sums side-by-side in a 32-bit word with the simple checksum at the least significant end. This algorithm is then called the Fletcher-32 checksum. The use of the modulus 65,535 is also generally implied. The rationale for this choice is the same as for Fletcher-16.