Cipher is one of the many names for the zero symbol. Now, of course, it now also means a code or encryption. I would like to draw your attention to this very cute poem about the double meaning of 0 and it’s name, “cipher”.
You O my O, but I O thee,
O O no O, but O O for me,
O let not my O a mere O go,
But O my O I O thee so.
Which translates into:
You sigh for my cipher, but I sigh for thee,
Oh, sigh for no cipher, but Oh sigh for me.
Oh let not my sigh for a mere cipher go,
But sigh for my sigh, for I sigh for thee so.