# Sui Co-Founder Develops Quantum-Resistant Wallets for $10 Mysten Labs is producing affordable hardware wallets to counter quantum threats. - **Source:** [Bitcoin News](https://brifing.si/source/d8aeaf1e-9839-4dad-9d25-7a6bf3fbeef8) - **Published:** 2026-08-11 - **Topic:** [Finance](https://brifing.si/c/finance) - **Original article:** - **On Brifing:** https://brifing.si/s/9336e1d5-6402-4381-b447-14cade23c9c0 ## Countering Quantum Threats Kostas Chalkias, co-founder and chief cryptographer at Mysten Labs, has leased a secret factory to produce quantum-resistant hardware wallets. This move responds to recent security breaches that cost bitcoin users $130 million. Chalkias aims to produce each quantum card key for under $10, making advanced security accessible to the masses. ## Cold Wallet Disaster A firmware flaw in Coinkite's Coldcard hardware wallets, dating back to 2021, led to the theft of 2,055 BTC from over 7,700 addresses starting July 30. Galaxy Research reports at least 15 different attackers targeted vulnerable wallets. This incident highlighted cryptographic vulnerabilities in hardware wallet solutions. ## A Personal Mission Chalkias pursues this project in his personal time outside his day job. His quantum cards using NFC technology achieve signature times of 1-2 seconds. He's even considering sponsoring cards for financially disadvantaged users. His statement 'What happened to Coldcard will NEVER happen to my people' underscores his commitment. ## Protocol-Level Innovations The Sui blockchain plans to implement two NIST-approved quantum-resistant signature schemes - one for everyday accounts and another for high-value Move-based vaults. Existing Sui accounts can rotate to quantum-safe keys without full wallet migration. This flexibility gives Sui a strategic advantage over competitors requiring disruptive hard forks. ## Mass Production Goals Chalkias prepares for mass production at his leased factory with friends' assistance. The price/performance ratio remains crucial for widespread quantum card adoption. NFC-based solutions aim to enhance user experience without complex quantum encryption processes, balancing security with practicality. ## Industry Developments Evan Cheng, Mysten Labs' other co-founder, advocates for all digital payments to transition to post-quantum cryptography standards. While other industry players work on similar technologies, Sui's $10 price target already positions it favorably in the emerging quantum security market. ## Prioritizing User Security The crypto industry experienced record security breaches in 2026. With quantum computers becoming more prevalent, these threats are expected to increase. Chalkias's project could revolutionize the industry by making high-security standards accessible to ordinary users at affordable prices. ## Future of Wallet Technology Quantum cryptography represents the new frontier of blockchain security. Sui's pioneering work in this field impacts both individual users and institutional investors. $10 hardware wallets could significantly reduce security concerns, one of the major barriers to broader cryptocurrency adoption. ## Sources covering this story - https://news.bitcoin.com/security/sui-chalkias-quantum-safe-wallet-cards/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._