Unverified50% confidenceFactExact time
Punycode's design goal is to guarantee reversibility while keeping the encoded length as short as possible, but it is not responsible for character normalization or security validation, so visually similar but distinct code points yield different Punycode results, which becomes the technical basis for homograph attacks.
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50%
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Long-term
Relevance
11/1/2026
First Seen
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