What Letter and Number Mixups Need to be Considered? [closed]
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19-09-2019 - |
Question
I just had a user tell me his registration key didn't work. It took me quite a while to figure out that he entered the capital letter "O" instead of the number "0".
So I decided that it is best for my registry checker to treat both "O" and "0" as equivalent, so both will work.
I can think of two other possible mixups:
- The number "1" and the capital letter "I" and the small letter "l"
- The number "5" and the letter "S" or "s".
Are these all of them, or are there others?
Solution
2 and Z or z. Possibly 9 and g, or 8 and B or 6 and G.
OTHER TIPS
A better solution might be to display the registration key using a font that clearly differentiates between O and 0 and I, 1, and l. Alternatively you could rework the registration system so that the user, in the normal case, does not have to directly enter a key.
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