--- title: Picking A CRC | daily.dev description: CRC (Cyclic Redundancy Check) is not a one-size-fits-all algorithm — choosing the right polynomial matters significantly. CRCs work via polynomial division... canonical: https://daily.dev/posts/picking-a-crc-t9pa6tgox twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Picking A CRC | daily.dev og:description: CRC (Cyclic Redundancy Check) is not a one-size-fits-all algorithm — choosing the right polynomial matters significantly. CRCs work via polynomial division... og:url: https://daily.dev/posts/picking-a-crc-t9pa6tgox og:image: https://api.daily.dev/og/posts/T9PA6TGoX.png og:image:alt: Picking A CRC 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. # Picking A CRC **[Hackaday](https://daily.dev/sources/hackaday)** · 8 min read · 0 upvotes · 0 comments ## Summary CRC (Cyclic Redundancy Check) is not a one-size-fits-all algorithm — choosing the right polynomial matters significantly. CRCs work via polynomial division over GF(2) using XOR arithmetic, and their error-detection strength (measured by Hamming distance) depends on both the polynomial chosen and the maximum message length being protected. Widely-used polynomials like CRC-16/CCITT (0x1021) and CRC-32 (0x04C11DB7) were often chosen for historical reasons, not mathematical optimality. Philip Koopman's research at CMU provides tables of better-performing polynomials for specific message lengths. Practical considerations include CRC width selection based on data size, hardware acceleration (Intel SSE4.2, ARM AArch64), lookup-table optimization for performance, and the importance of fully specifying all CRC parameters (initial value, reflection, final XOR) to avoid interoperability bugs between implementations labeled the same name. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#embedded](https://daily.dev/tags/embedded) [View this post on daily.dev](https://daily.dev/posts/picking-a-crc-t9pa6tgox) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Picking A CRC","url":"https://daily.dev/posts/picking-a-crc-t9pa6tgox","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/picking-a-crc-t9pa6tgox"},"datePublished":"2026-06-15T14:32:53.039Z","dateModified":"2026-06-15T14:33:16.493Z","description":"CRC (Cyclic Redundancy Check) is not a one-size-fits-all algorithm — choosing the right polynomial matters significantly. CRCs work via polynomial division...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/76c37638264bddfd6e81f793b1c51f57?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/76c37638264bddfd6e81f793b1c51f57?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Hackaday","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Hackaday","logo":"https://media.daily.dev/image/upload/s--JhDfhy70--/f_auto,q_auto/v1767541814/logos/hackaday","url":"https://daily.dev/sources/hackaday"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/picking-a-crc-t9pa6tgox","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"embedded","timeRequired":"PT8M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Hackaday","item":"https://daily.dev/sources/hackaday"},{"@type":"ListItem","position":3,"name":"Picking A CRC"}]} ```