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    3. CRYPTO 2026 Focuses on Post-Quantum Cryptography: The Real Challenge for Blockchain Is Not Algorithm Change, But Migrating Existing Assets

    CRYPTO 2026 Focuses on Post-Quantum Cryptography: The Real Challenge for Blockchain Is Not Algorithm Change, But Migrating Existing Assets

    By: www.528btc.com|2026/08/18 02:37:00
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    CoinWorld reports:

    The 46th International Cryptology Conference CRYPTO 2026 will be held from August 17 to 20 in Santa Barbara, California, organized by the International Association for Cryptologic Research. According to the conference proceedings published by Springer, this year's conference selected 189 full papers from 781 submissions, covering topics such as public-key cryptography, cryptographic protocols, zero-knowledge proofs, digital signatures, secure multi-party computation, quantum cryptography, and cryptanalysis. It is an academic cryptography conference, not a cryptocurrency exhibition, but many of the studies are directly related to blockchain signatures, data availability, and long-term security.

    IBM Research listed works presented at the conference, including post-quantum non-interactive key exchange, homomorphic encryption, and signature schemes, with the CORAL paper winning the Best Paper Award for Young Researchers. Another research team will introduce "Beholder Signatures" at the conference, aiming to allow signers to not only prove they hold the key but also demonstrate they possess the complete message; the researchers believe this method can be used in distributed storage and data availability systems to prevent service providers from pretending to have stored data without a complete download.

    Post-Quantum Security Is Not About "Quantum Computers Stealing Coins Tomorrow," But the Migration Clock Has Already Started

    Currently, there is no public evidence that quantum computers have the capability to break mainstream blockchain signature systems. Describing academic progress as Bitcoin or other networks being on the verge of collapse exaggerates the real risks. However, the other extreme is equally dangerous: assuming no preparation is needed simply because the attacking machines do not yet exist. Blockchain has long-term stock, irreversible transactions, and decentralized governance, and the upgrade cycle may be much longer than the typical website's certificate renewal.

    Many public chains rely on Elliptic Curve Digital Signatures to prove asset control. If sufficiently powerful quantum computers in the future can derive private keys from public keys, addresses that have already exposed their public keys may face risks. Hash functions will also be affected by quantum algorithms, but the manner of security loss differs from signature systems, and it cannot be simply stated that "all cryptography fails simultaneously." The network needs to evaluate dependencies on signatures, key exchanges, zero-knowledge proofs, and hardware wallets one by one.

    The more challenging issue is the migration of existing assets. Developers can add post-quantum signatures for new addresses, but they cannot automatically move old assets for all users. Long-inactive addresses, lost key assets, multi-signature accounts, custodial platforms, and smart contracts all require different paths. If it is stipulated that old signatures become invalid after a certain cutoff block, it may freeze legitimate users; if old signatures are always allowed, it will retain potential attack vectors.

    Post-quantum signatures typically also come with larger public keys, signature, or verification costs. Blockchains must make trade-offs between security, block space, node bandwidth, and verification speed. An algorithm that is secure in the lab may not be suitable for high-frequency on-chain transactions. Hybrid signatures can require both traditional and post-quantum proofs during the transition period, providing higher security redundancy but further increasing data and implementation complexity.

    From Papers to Mainnet, Password Agility, Governance, and User Operations Must Work Together

    The value of CRYPTO 2026 lies in providing peer-reviewed new constructions, attack analyses, and efficiency improvements, but acceptance of papers does not mean the algorithms are suitable for protecting real assets. Before landing on the mainnet, independent audits, formal verification, implementation testing, side-channel assessments, and long-term cryptanalysis are still needed. Especially for complex homomorphic or lattice-based schemes, there have historically been cases where candidate algorithms quickly lost security under new attacks.

    Blockchain projects should first establish "cryptographic agility," meaning protocols can replace signature or proof modules without rebuilding the entire system. Address formats need to reserve versions, wallets need to recognize multiple keys, hardware devices must support firmware upgrades, and exchanges and custodians must modify deposit, withdrawal, and risk control processes. Without these interfaces, even if mature standards emerge in the future, migration will still be slowed down by engineering debt.

    Governance is equally critical. Who decides to enable new algorithms, how long old addresses are retained, who bears the migration costs, and how to handle untransferred assets will all affect property rights and network consensus. Technical teams cannot just complete upgrades in the code repository; they must also ensure users understand the risks and take action. For wallets that have been inactive for years, simply sending notifications is clearly insufficient.

    Research like "Beholder Signatures" also shows that cryptographic upgrades are not just for preventing quantum attacks. Distributed storage, data availability, and multi-party collaboration require stronger knowledge proofs: participants should not only prove they own a key but also demonstrate they genuinely hold the data required by the system. If these constructions can reduce computational costs while maintaining short signatures, they may improve the credibility of blockchain scalability and decentralized storage.

    For investors, post-quantum labels cannot replace security audits. When projects claim to be "quantum secure," they should specify what algorithms are used, what security assumptions are based on, whether they have undergone public analysis, how key and signature sizes affect the network, and how old assets will be migrated. Projects that only change marketing pages without migration plans have not solved the core issues.

    CRYPTO 2026 reminds the industry that blockchain security comes from continuous maintenance, not a one-time choice made at the genesis block. Quantum risks may still be distant, but existing assets, decentralized users, and slow governance dictate that preparations must begin early. A truly mature network will not predict a specific "quantum doomsday" date but will start designing migration paths that are replaceable, testable, reversible, and manageable by ordinary users from today.

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    This content is provided for general informational purposes only and doesn't constitute financial, investment, legal, or tax advice. Any events, rewards, online promotions, or related information mentioned herein should not be considered a recommendation, solicitation, or invitation to purchase, sell, trade, or otherwise deal in any crypto assets. Crypto assets are highly volatile and may result in loss. The availability of WEEX services, products, and related events may vary by region. You are responsible for ensuring that your participation is in accordance with applicable local laws and regulations.

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    Contents

    Post-Quantum Security Is Not About "Quantum Computers Stealing Coins Tomorrow," But the Migration Clock Has Already Started
    From Papers to Mainnet, Password Agility, Governance, and User Operations Must Work Together
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