Developer Advocate

Here's what researchers are doing to protect Bitcoin from quantum threats. Rather than requiring changes to Bitcoin's core rules, the approach lets users opt into quantum-resistant protection at the contract level. Blockstream Research has deployed what it says are the first transactions on a live Bitcoin sidechain protected by post-quantum cryptography. This is in direct response to growing warnings that powerful quantum computers could eventually break the security systems that protect crypto wallets. What Blockstream actually built. Following Google's recent quantum paper examining risks across several layers of the crypto system, including wallets, block validation, and cross-chain bridges, Blockchain Research revealed that it had already deployed a post-quantum signature scheme, known as SHRINCS, on Bitcoin's Liquid sidechain. According to the research firm, users can now lock funds into contracts that require quantum-resistant signatures to spend them. The approach avoids changes to the network's core rules. Instead, it uses Simplicity, Blockstream's smart contract language, to add new security conditions at the user level, meaning that anyone who wants added protection can opt in without waiting for a network-wide upgrade. Their research also broke down four main risks identified for sidechains: forged transaction signatures, forged block signatures, broken confidential transactions, and attacks on bridge mechanisms that move assets between chains. The team said that work on these areas is at different stages, with transaction signatures already deployed, while block signing and confidential asset protections are still in testing or development. Research into securing bridged Bitcoin is also going on. According to the Google paper, a sufficiently advanced quantum computer could break the private keys of major crypto wallets in a matter of days. It also raised the possibility of "mempool attacks," where funds could be intercepted before transactions are confirmed. You may also like: Debate continues over urgency and path to upgrades. The wider crypto community is divided on how soon these risks could materialize, with Changpeng Zhao, the former CEO of Binance, saying recently that there is "no need to panic." According to him, networks can switch to quantum-resistant algorithms when they need to. He did, however, point out one awkward problem: the estimated one million BTC that belong to Satoshi Nakamoto are stored in an old wallet format that doesn't protect them from quantum attacks. CZ suggested those coins may eventually need to be locked or effectively removed from circulation if Satoshi never moves them. Blockstream is also working on a related scheme called SHRIMPS, which produces post-quantum signatures roughly three times smaller than current US government standards, built specifically for Bitcoin's tight block space limits. A Bitcoin Improvement Proposal for it is in progress. What's running on Liquid today is the proof that it can work in a real environment, under real conditions, with real funds at stake. SPECIAL OFFER (Exclusive) Binance Free $600 (CryptoPotato Exclusive): Use this link to register a new account and receive $600 exclusive welcome offer on Binance (full details). LIMITED OFFER for CryptoPotato readers at Bybit: Use this link to register and open a $500 FREE position on any coin!

Take control: Blockstream Jade integration is officially LIVE in Custody Safe. SmashFi Custody Safe now seamlessly integrates with Blockstream Jade hardware wallets, enabling Bitcoin holders to maintain complete control over their private keys while leveraging automated growth strategies. Why Hardware Wallet Integration Matters for Bitcoin Self-Custody True financial sovereignty in the cryptocurrency space begins with a fundamental principle: holding your own keys. For Bitcoin investors who value security and independence, leaving digital assets on centralized platforms introduces unnecessary counterparty risk. Exchange insolvencies, security breaches, and unauthorized access remain persistent threats that can result in complete loss of holdings. Hardware wallet integration represents a critical evolution in Bitcoin custody strategy. By maintaining private keys on dedicated physical devices, investors eliminate the vulnerability of hot wallets and exchange custody while retaining full control over their assets. This approach ensures that no third party - including the platform itself - can ever access, freeze, or confiscate your Bitcoin. The integration of Blockstream Jade with SmashFi Custody Safe bridges the gap between uncompromising security and platform convenience. This milestone enables members to leverage automated Bitcoin accumulation strategies and portfolio management tools while maintaining absolute custody of their private keys. Your Bitcoin remains under your complete control, secured by your hardware device, with SmashFi operating exclusively as a watch-only interface. How Blockstream Jade and Custody Safe Work Together Seamlessly The SmashFi Custody Safe now offers direct integration with Blockstream Jade hardware wallets through a sophisticated yet user-friendly architecture. Connection is established via air-gapped QR code scanning, eliminating any direct digital connection that could potentially expose private key material. Your Jade device generates and stores extended public keys (xpubs) that allow SmashFi to monitor balances and generate receiving addresses without ever accessing private keys. Currently live is the seamless manual sweep functionality. After accumulating Bitcoin through Dynamic DCA strategies on the platform, members can initiate transfers to their Jade wallet whenever they choose. The process maintains complete security: transaction details are displayed on your Jade device screen for verification, you physically confirm the transfer on the hardware wallet, and the signed transaction is broadcast without SmashFi ever touching your private keys. This watch-only wallet model ensures absolute zero-trust security. SmashFi can view your balance and transaction history to provide portfolio insights and automated buying services, but cannot initiate any transactions without your explicit authorization on your physical Jade device. Your Auto-Buy plans continue operating seamlessly, with Bitcoin accumulating on the platform until you decide to sweep it to your self-custody hardware wallet. Your Bitcoin, Your Keys: Understanding the Technical Architecture The technical foundation of this integration prioritizes security through proven cryptographic principles. Blockstream Jade operates as a hardware security module, generating and storing private keys entirely within the device's secure element. When you connect Jade to SmashFi Custody Safe, you export only the extended public key - a mathematical derivation that allows address generation and balance monitoring without revealing any private key information. The air-gapped QR code method provides an additional security layer by eliminating direct data connections. Your Jade device displays QR codes containing public key information and signed transactions, while your computer camera reads this data without establishing any two-way digital communication channel. This approach prevents potential attack vectors that could exploit USB connections or wireless protocols. SmashFi's architecture maintains strict separation between custody and functionality. Your Bitcoin accumulated through Auto-Buy strategies resides in SmashFi's secure infrastructure until you choose to transfer it. Once swept to your Jade wallet, the Bitcoin exists exclusively under your control at addresses derived from your hardware device. SmashFi can observe these addresses for balance reporting purposes but possesses zero capability to move funds. This technical separation ensures that platform features like automated purchasing and portfolio tracking operate without compromising self-custody principles. Automated Growth Strategies Without Compromising Security The Jade integration delivers a powerful combination: sophisticated automated Bitcoin accumulation strategies paired with uncompromising self-custody security. Members can continue utilizing SmashFi's Auto-Buy feature to implement Dollar-Cost Averaging and Low-Price Buying strategies, earning Satoshi rewards for qualifying purchases. These automated plans run continuously, accumulating Bitcoin on your behalf while you maintain ultimate custody through your hardware wallet. The roadmap for automation extends even further. Auto Self-Custody functionality will soon enable threshold-based automatic sweeps directly to your Jade wallet. Set your preferred accumulation target, and SmashFi will automatically transfer Bitcoin to your hardware wallet once that amount is reached - zero manual intervention required. This eliminates the operational friction of regular manual transfers while maintaining complete security through hardware wallet confirmation. Transaction fee optimization through Satoshi rewards represents another significant advantage. Members can use the rewards earned through Auto-Buy activities to cover 100% of on-chain withdrawal fees, reducing the cost barrier to regular self-custody transfers. Combined with upcoming USB integration for streamlined xpub registration and mobile QR companion features for enhanced device compatibility, the platform is evolving toward completely frictionless self-custody without sacrificing security or convenience. Getting Started: Setting Up Your Jade Wallet with Custody Safe Connecting your Blockstream Jade wallet to SmashFi Custody Safe is straightforward and secure. Begin by ensuring your Jade device is properly initialized with firmware updated to the latest version. Navigate to the Custody Safe section within your SmashFi account and select the option to connect a Jade wallet. Follow the on-screen instructions to generate an xpub QR code on your Jade device. Position the QR code in front of your computer's webcam, allowing SmashFi to scan and register your hardware wallet as a watch-only account. The entire process requires no direct digital connection - all information transfer occurs through air-gapped QR codes that contain only public key information. Once connected, your Jade wallet appears in your Custody Safe dashboard with full balance visibility and transaction history. Your Auto-Buy plans continue operating as configured, with Bitcoin accumulating on the platform. When you're ready to transfer Bitcoin to your hardware wallet, initiate a manual sweep from the Custody Safe interface, verify the transaction details on your Jade screen, and physically confirm the transfer on your device. Your Bitcoin moves directly to addresses controlled exclusively by your hardware wallet, with SmashFi maintaining watch-only visibility for portfolio management purposes. Please note that SmashFi has updated its Terms of Service and Privacy Policy to reflect the addition of Custody Safe functionality. Smashfi Llc encourage all members to review these documents to understand how the platform handles watch-only wallet data and maintains security standards for hardware wallet integrations.