Luhn algorithm
Simple checksum formula
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Luhn algorithm
Simple checksum formula
The Luhn algorithm or Luhn formula (creator: IBM scientist Hans Peter Luhn), also known as the "modulus 10" or "mod 10" algorithm, is a simple check digit formula used to validate a variety of identification numbers. The purpose is to design a numbering scheme in such a way that when a human is entering a number, a computer can quickly check it for errors.
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The Luhn algorithm or Luhn formula (creator: IBM scientist Hans Peter Luhn), also known as the "modulus 10" or "mod 10" algorithm, is a simple check digit formula used to validate a variety of identification numbers. The purpose is to design a numbering scheme in such a way that when a human is entering a number, a computer can quickly check it for errors. The algorithm is in the public domain and is in wide use today. It is specified in ISO/IEC 7812-1. It is not intended to be a cryptographically secure hash function; it was designed to protect against accidental errors, not malicious attacks. Most credit card numbers and many government identification numbers use the algorithm as a simple method of distinguishing valid numbers from mistyped or otherwise incorrect numbers.
Texto: Wikipédia em inglês, CC BY-SA 4.0. · Imagem: Petr Štefek (CC BY 3.0) ·
