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I'm not apologizing for MS, and I have no idea what PII protection Recall actually has. If Recall does have real PII logic, it should recognize that a legitimat
by ghelmer 2y ago
I'm not apologizing for MS, and I have no idea what PII protection Recall actually has. If Recall does have real PII logic, it should recognize that a legitimate VISA payment card numbers must start with '4' + be 16 digits in length, and AmEx cards must start with '34' or '37' + be 15 digits in length; also, the LUHN algorithm must be satisfied over the card digits.
With Recall, it seems false positives for PII-type protection rules would be more acceptable than false negatives. But with the negative press already around the technology. I'm not sure it will ever gain acceptance.
- Rygian 2y agoThere are card numbers that don't satisfy Luhn.
- drdaeman 2y agoI'm really curious now - which cards don't conform? I always thought it's basically an industry standard and no network issues cards that don't have a correct checksum.
- exikyut 2y agoTIL, although this isn't a field I need perfect knowledge of. I wonder if people with such cards have inexplicable problems with certain payment systems? Edit: just saw the sibling comment, was viewing an old copy of the page
- Rygian 2y agoFolks at $dayJob keep a list of prefixes of credit card numbers that don't satisfy Luhn, currently there's 8 of them. And while we're at it, length of credit card numbers is not fixed, can go from 12 to 19 numbers (both Luhn and non-Luhn).