Fletcher's Checksum
The Fletcher checksum is an algorithm for computing a position-dependent checksum devised by John G. Fletcher at Lawrence Livermore Labs in the late 1970s. The objective of the Fletcher checksum was to provide error-detection properties approaching those of a cyclic redundancy check but with the lower computational effort associated with summation techniques.
Read more about Fletcher's Checksum: Fletcher-16, Fletcher-32, Fletcher-64, Comparison With The Adler Checksum, Example Calculation of The Fletcher Checksum, Weaknesses, Implementation
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We convent nought else but woes.”
—John Fletcher (1579–1625)