Web3 Industry Weekly Report: Highlights from Week 3 of June 2026
Tech Headlines
1. Arc Proposes a Controllable Privacy Solution, Plans to Support Institution-Oriented Privacy-Preserving Smart Contracts
https://www.arc.io/blog/privacy-with-control-how-arc-can-unlock-onchain-finance
On June 10, Arc, under Circle, released a privacy roadmap article introducing the Arc Privacy privacy-preserving smart contract engine. The solution is aimed at enterprises and developers, allowing sensitive transaction details to be selectively protected in business processes such as payroll, treasury management, trading, and asset issuance, while retaining authorized access for compliance, risk control, and audit teams. Arc emphasizes that the solution maintains an EVM-compatible development experience, enabling institutions to migrate sensitive business onchain without giving up existing smart contract toolchains.
2. Ethereum Researcher Proposes a Post-Quantum Account Protection Scheme Without a Hard Fork, Exploring an EVM-Native Signature Verification Path
On June 12, Nicolas Consigny, head of the Ethereum Foundation's Kohaku project, published a SPHINCS- research article on Ethereum Research, proposing an optimized post-quantum signature verification path for the EVM. The scheme adapts the SPHINCS+ hash-based signature approach for the EVM, leveraging existing execution environment capabilities such as KECCAK256, and can add post-quantum protection for Ethereum accounts through smart contract accounts or wallet layers without requiring precompiles, hard forks, or protocol changes. Under current network cost assumptions, the verification cost is approximately $0.07, and the technology remains in the research and audit advancement stage.
3. Humanity Publishes Independent Investigation into Security Incident: Phishing Attack Led to Private Key Leak, Mainnet Bridge Unaffected
https://www.odaily.news/zh-CN/newsflash/490323
On June 14, Humanity published an independent investigation report by Quantstamp. The report disclosed that the attacker used social engineering methods such as impersonating exchange communications and sending phishing emails to induce a project director to open a malicious attachment. By leveraging a remote access trojan, the attacker obtained wallet private key access, then carried out unauthorized operations on the Ethereum-side contract and affected the BNB Chain-side contract management permissions. The report confirms that the Ethereum-side contract has been frozen and that the mainnet bridge was not affected. The incident highlights the need for project teams to strengthen multisig key isolation, minimize administrative privileges, and improve phishing defenses.
4. Advanced AI Models May Accelerate Onchain Attack Discovery and Social Engineering Attacks
On June 13, CoinDesk analyzed the potential impact of stronger AI reasoning and coding capabilities on the security of the crypto industry. Security experts pointed out that AI may not create entirely new attack types, but it will significantly shorten the time from vulnerability discovery to attack execution, accelerating attackers' ability to find misconfigurations, construct attack paths, and generate social engineering materials. Data shows that DeFi attack losses in the first five months of 2026 have already exceeded $840 million, with major risks commonly arising from private key exposure, flaws in signing processes, social engineering, and weak operational privilege management.
Industry Dynamics
1. Japan's Three Major Banks Plan to Bring a Jointly Issued Stablecoin into Real-World Business Transactions Within FY2026
https://www.bk.mufg.jp/news/news2026/pdf/news0610.pdf
On June 10, Mitsubishi UFJ Bank, Mizuho Bank, and Sumitomo Mitsui Banking Corporation announced that the three institutions aim to bring a jointly issued stablecoin into actual business transactions within fiscal year 2026. The three banks plan to act as joint entrustors, with trust banks and other institutions serving as trustees to issue a trust-contract-based stablecoin, and will establish a council to discuss operations, governance, issuance infrastructure, and system design. The project builds on experimental results supported by Japan's Financial Services Agency's "Fintech Proof-of-Concept Hub," and future discussions will also cover cooperation with other financial institutions.
2. U.S. Bipartisan Lawmakers Propose a Cryptocurrency Theft Enforcement Coordination Bill, Seeking to Establish an Interagency Task Force at the Department of Justice
https://gooden.house.gov/press-releases?ID=5E9EB071-9CFD-4611-9930-6A668031BA7E
On June 11, U.S. House members introduced the Federal Cryptocurrency Theft Enforcement and Coordination Act, which seeks to establish a federal cryptocurrency theft task force within the Department of Justice. Led by the Attorney General and working with agencies such as the Federal Bureau of Investigation, the Department of Homeland Security, and the Treasury Department, the task force would create a federal coordination mechanism for cryptocurrency theft cases. The bill focuses on evidence collection, blockchain forensics, asset tracing, victim support, and law enforcement training, and is oriented toward criminal enforcement and victim protection.
3. Japan's House of Representatives Passes Crypto Asset Regulatory Amendment, Seeking to Bring Crypto Assets Under the Financial Instruments Regulatory Framework
https://www.neweconomy.jp/posts/582198
On June 11, Japan's House of Representatives passed the Partial Amendment to the Financial Instruments and Exchange Act and the Payment Services Act, and the bill has now moved to the House of Councillors for review. The amendment seeks to move regulation of crypto asset trading from the Payment Services Act framework to the Financial Instruments and Exchange Act framework, positioning crypto assets as "financial products other than securities." Key measures include improving regulation of trading businesses, introducing disclosure requirements, establishing rules against unfair trading, and bringing investment management and investment advisory activities under corresponding regulatory oversight. If passed by the House of Councillors, Japan's crypto asset market will move closer to a securities-style regulatory logic.
4. Hungary Plans to Scrap Criminal Penalties Related to Crypto Asset Trading, with Its Regulatory Framework Potentially Moving Closer to the EU's MiCA
https://crypto.news/hungary-to-scrap-crypto-trading-penalties-after-2025-crackdown/
On June 11, Bloomberg reported that Hungary plans to revoke the criminal penalties previously associated with crypto asset trading. The framework, introduced by the former government in 2025, required crypto asset trading to obtain compliance certification and had prompted platforms such as Revolut to suspend related services in Hungary. The European Union is also reviewing whether these rules comply with EU law. Hungary's new government plans to adjust the measures so that its regulatory path is closer to the EU's MiCA framework, signaling a more rational regulatory approach.
In-Depth Analysis
1. BlackRock Releases Quantum Computing and Blockchain White Paper: Post-Quantum Migration Is More a Governance and Execution Challenge
https://www.blackrock.com/us/individual/literature/whitepaper/quantum-whitepaper.pdf
BlackRock released the Quantum Computing and Blockchains white paper, which systematically discusses the potential impact of quantum computing on modern cryptography and blockchain. The report states that there is currently no cryptography-related quantum computer capable of posing a practical threat to mainstream encryption systems, but the technology roadmaps of companies such as Google and IBM make the "Q-Day" time window worth planning for in advance. The report notes that the elliptic curve cryptography signatures widely used by Bitcoin and Ethereum may need to migrate to post-quantum alternatives in the future. BlackRock judges that post-quantum migration for blockchains is technically manageable, but the greater challenges are likely to lie in governance and execution, such as community coordination, migration pace, and upgrades to wallet and custody infrastructure.
Disclaimer: The information provided in this document is based on publicly available market data and industry trends, and is for reference only. Please note that this information does not constitute any form of investment advice or recommendation, nor should it be considered as the basis for buying or selling any financial products or services. In case of any translation errors in English, inaccuracies, or situations requiring further clarification, please contact us through 'Contact Us' so that we can verify and make necessary corrections in a timely manner.
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