--- title: Sui Co-Founder Works on $10 Quantum-Safe Hardware Wallet... description: Sui co-founder and chief cryptographer Kostas Chalkias is personally developing quantum-safe hardware wallet cards for Sui users, leasing a dedicated factory... canonical: https://daily.dev/posts/sui-co-founder-works-on-10-quantum-safe-hardware-wallet-cards-rdczjaamf twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Sui Co-Founder Works on $10 Quantum-Safe Hardware Wallet Cards | daily.dev og:description: Sui co-founder and chief cryptographer Kostas Chalkias is personally developing quantum-safe hardware wallet cards for Sui users, leasing a dedicated factory... og:url: https://daily.dev/posts/sui-co-founder-works-on-10-quantum-safe-hardware-wallet-cards-rdczjaamf og:image: https://api.daily.dev/og/posts/RdcZJAamF.png og:image:alt: Sui Co-Founder Works on $10 Quantum-Safe Hardware Wallet Cards 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. # Sui Co-Founder Works on $10 Quantum-Safe Hardware Wallet Cards **[The Quantum Insider](https://daily.dev/sources/thequantuminsider)** · 3 min read · 0 upvotes · 0 comments ## Summary Sui co-founder and chief cryptographer Kostas Chalkias is personally developing quantum-safe hardware wallet cards for Sui users, leasing a dedicated factory to manufacture them at scale with a target price under $10 and a target NFC signature time of one to two seconds. He cites the Coldcard hardware wallet incident—a firmware flaw dating to 2021 that bypassed hardware randomness generation and led to roughly $130 million in stolen BTC across multiple waves—as motivation, even though that flaw was not a quantum attack. Sui is separately pursuing protocol-level upgrades to adopt two NIST-approved post-quantum signature schemes, one for regular accounts and one for high-value Move-based vaults, allowing existing accounts to migrate to quantum-resistant keys via recovery phrases without moving funds to new wallets. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What caused the Coldcard hardware wallet hack that led to stolen bitcoin? A firmware flaw dating back to a 2021 update bypassed Coldcard's dedicated hardware randomness chip during key generation, substituting a predictable software-based process that in some cases relied on values like device serial numbers. Attackers began draining funds on July 30, with losses reaching an estimated 2,055 BTC, worth close to $130 million, across multiple waves involving at least 15 different attackers. _daily.dev surfaces security incident writeups like this for teams hardening wallet and key-generation code._ ### Is Sui planning to add post-quantum cryptography support? Yes, Sui plans to add two NIST-approved post-quantum signature schemes at the protocol level, one for everyday accounts and a second for high-value Move-based vaults. Existing accounts could transition to quantum-resistant keys derived from their current recovery phrases, avoiding a move to entirely new wallets, and Sui's flexible authentication model is argued to make this easier than networks needing a hard fork. _Track evolving post-quantum migration strategies across blockchains on daily.dev before you need to act._ ## Similar posts on daily.dev - [qLABS and Quantum Inc. Launch Quantum-Sig Wallet for Post-Quantum Security](https://daily.dev/posts/qlabs-and-quantum-inc-launch-quantum-sig-wallet-for-post-quantum-security-yjstbl2q6) · The Quantum Insider · 2 upvotes · 0 comments - [They Didn’t Steal Your Keys. They Regenerated Them.](https://daily.dev/posts/they-didn-t-steal-your-keys-they-regenerated-them--zeogglmg2) · Coins Bench · 3 upvotes · 1 comments - [Crypto hardware wallet owners face fresh security risks after recent spate of personal data thefts](https://daily.dev/posts/crypto-hardware-wallet-owners-face-fresh-security-risks-after-recent-spate-of-personal-data-thefts-cfoxbggml) · TechCrunch · 0 upvotes · 0 comments - [Neha's Writings](https://daily.dev/posts/neha-s-writings-zksfwvlqh) · Hacker News · 0 upvotes · 0 comments - [Developers Push Quantum-Safe Bitcoin Transaction Cost Below $70](https://daily.dev/posts/developers-push-quantum-safe-bitcoin-transaction-cost-below-70-dpxmoce91) · The Quantum Insider · 0 upvotes · 0 comments --- Tags: [#blockchain](https://daily.dev/tags/blockchain), [#quantum-computing](https://daily.dev/tags/quantum-computing), [#cryptography](https://daily.dev/tags/cryptography) [View this post on daily.dev](https://daily.dev/posts/sui-co-founder-works-on-10-quantum-safe-hardware-wallet-cards-rdczjaamf) ```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":"Sui Co-Founder Works on $10 Quantum-Safe Hardware Wallet Cards","url":"https://daily.dev/posts/sui-co-founder-works-on-10-quantum-safe-hardware-wallet-cards-rdczjaamf","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/sui-co-founder-works-on-10-quantum-safe-hardware-wallet-cards-rdczjaamf"},"datePublished":"2026-08-12T13:49:37.099Z","dateModified":"2026-08-12T13:50:01.712Z","description":"Sui co-founder and chief cryptographer Kostas Chalkias is personally developing quantum-safe hardware wallet cards for Sui users, leasing a dedicated factory...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e142ccf3828bbc2d0293b286b4834cbf?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e142ccf3828bbc2d0293b286b4834cbf?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"The Quantum Insider","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":"The Quantum Insider","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/7b14a6b34c1b464c9e8a88d9a0dac951","url":"https://daily.dev/sources/thequantuminsider"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/sui-co-founder-works-on-10-quantum-safe-hardware-wallet-cards-rdczjaamf","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"blockchain,quantum-computing,cryptography","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"The Quantum Insider","item":"https://daily.dev/sources/thequantuminsider"},{"@type":"ListItem","position":3,"name":"Sui Co-Founder Works on $10 Quantum-Safe Hardware Wallet Cards"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/sui-co-founder-works-on-10-quantum-safe-hardware-wallet-cards-rdczjaamf#faq","mainEntity":[{"@type":"Question","name":"What caused the Coldcard hardware wallet hack that led to stolen bitcoin?","acceptedAnswer":{"@type":"Answer","text":"A firmware flaw dating back to a 2021 update bypassed Coldcard's dedicated hardware randomness chip during key generation, substituting a predictable software-based process that in some cases relied on values like device serial numbers. 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