--- title: Same Look, Different Code: The Technical Reality Behind... description: Homoglyph attacks exploit the gap between how characters look and how computers interpret them. By substituting visually identical characters from different... canonical: https://daily.dev/posts/same-look-different-code-the-technical-reality-behind-homoglyph-attacks-y0zjzlc1m twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Same Look, Different Code: The Technical Reality Behind Homoglyph Attacks | daily.dev og:description: Homoglyph attacks exploit the gap between how characters look and how computers interpret them. By substituting visually identical characters from different... og:url: https://daily.dev/posts/same-look-different-code-the-technical-reality-behind-homoglyph-attacks-y0zjzlc1m og:image: https://api.daily.dev/og/posts/Y0ZJzLc1m.png og:image:alt: Same Look, Different Code: The Technical Reality Behind Homoglyph Attacks og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Same Look, Different Code: The Technical Reality Behind Homoglyph Attacks **[Security Boulevard](https://daily.dev/sources/securityboulevard)** · 7 min read · 0 upvotes · 0 comments ## Summary Homoglyph attacks exploit the gap between how characters look and how computers interpret them. By substituting visually identical characters from different Unicode scripts (e.g., Cyrillic 'а' for Latin 'a'), attackers can register deceptive domains, spoof email addresses, forge file names, and bypass string-matching security filters. The attack relies on Internationalized Domain Names (IDNs) and Punycode encoding, which allows browsers to display Unicode domains while resolving to entirely different attacker-controlled destinations. The post walks through the attack construction steps — target selection, finding confusable characters, crafting deceptive assets, and infrastructure setup — and recommends defenses including Unicode-aware application design, mixed-script detection, domain monitoring, and continuous security testing. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Punycode: My New Favorite Algorithm](https://daily.dev/posts/punycode-my-new-favorite-algorithm-oizfhofuk) · Lobsters · 0 upvotes · 0 comments - [I rendered 1,418 Unicode confusable pairs across 230 fonts. 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