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<p>errors. </p>

<p>The algorithm is in the <a href="page.php?w=public_domain">public domain</a> and is in wide use today. It is specified in <a href="page.php?w=ISO%2FIEC_7812-1">ISO/IEC 7812-1</a>. It is not intended to be a <a href="page.php?w=cryptographic_hash_function">cryptographically secure hash function</a>; it was designed to protect against accidental errors, not malicious attacks. Most <a href="page.php?w=credit_card_number">credit card number</a>s and many <a href="page.php?w=government_identification_numbers">government identification numbers</a></p><p>
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