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Ambiguous letters

August 16, 2013

If one is to be clear about which letters exactly are in a password, then they should not be ambiguous when written. The following are ambiguous.

Because they look the same:

6 (six) b (bee), O (capital oh) 0 (zero), 2 (two) Z (zee), 1 (one) l (el) I (upper case i), 5 (five) S (upper case ess),

Because upper and lower are similar:

C c, K k, O o, S s, U u, V v, W w, X x, Y y, Z z

Which leaves us with the fairly unambiguous character set:

234789aABdDeEfFgGhHijJLmMnNpPqQrRtT

Another note: in some fonts, “q” and “g” look alike, and “8” and “g” look alike as well.

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From → Technology

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