Use this tool to quickly calculate FLETCHER checksums.
Use this tool to quickly calculate FLETCHER checksums.
John G. Fletcher while working at Lawrence Livermore Labs in the late 1970s, developed the Fletcher checksum, which is an algorithm used for calculating a position-dependent checksum. The aim behind creating the Fletcher checksum was to achieve error-detection capabilities comparable to cyclic redundancy checks, while keeping computational efforts lower by utilizing summation techniques.
A comparative study demonstrated that Fletcher-32 surpasses Adler-32 in terms of both performance and error detection. The use of modulo-65,535 addition in Fletcher-32 is simpler and faster to implement compared to modulo-65,521 addition, resulting in a generally faster algorithm.
In summary, the Fletcher checksum, offers an efficient method for error detection that balances computational effort and error-detection properties, outperforming Adler-32 in both performance and error detection capabilities.