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> Lifehacкer.com mimicked lifehacker.com with the only difference in Cyrillic letter ‘к’ instead of Latin ‘k’ used in the original traffic source. The substitution was obscure.

The Wikipedia article "IDN homograph attack" describes various ways in which web browsers and ICANN try to protect users against this sort of shenanigan: https://en.wikipedia.org/wiki/IDN_homograph_attack#Defending...

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