a16z Leads $25M Investment, 0xMiden to Run a Privacy Chain on Your Phone

By: blockbeats|2025/04/30 14:05:19
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The recent market has been trading sideways, with few hot spots and retail investor sentiment not particularly enthusiastic. However, it is often during these "directionless" times that smart money has quietly started to move. This is especially true in those old narratives that have been repeatedly discussed, and even once considered "untradeable."

On April 29th of this year, privacy blockchain 0xMiden announced a $25 million seed round investment, led by a16zcrypto, hackVC, and 1kxnetwork, with participation from Finality Capital Partners, Symbolic Capital, and individual investors including Avery Ching (Aptos Labs CEO) and Rune Christensen (MakerDAO founder).

0xMiden is focused on the concept of "edge blockchain," aiming to allow applications to choose between a publicly transparent path and a one-click switch to privacy mode when processing transactions, all without sacrificing scalability. The project is incubated with support from the encrypted fundraising data platform CryptoRank.

a16z Leads 5M Investment, 0xMiden to Run a Privacy Chain on Your Phone

Seeing it being surrounded by big players in the ZK and privacy narratives, I became curious: What key point has this project hit that has attracted a rush of capital? What sets 0xMiden apart from projects like Aztec and Zcash, which have long been involved in privacy?

To understand this question, we must first grasp one thing: the current state of blockchain technology is actually very "non-private." However, if you blindly pursue privacy, you will sacrifice both scalability and compliance.

So, while the privacy chain direction has been talked about for years, there has never been a solution that is "usable, scalable, and not subject to blanket regulation."

Now, 0xMiden is attempting to take a new perspective on this challenge.

A Privacy Chain That Can Run Without Being Connected to the Internet

0xMiden calls itself an "edge blockchain," which may sound somewhat like edge computing, but essentially means: smart contracts are no longer all executed on the chain; instead, users perform the computations on their own devices locally, package them into a ZK proof, and then broadcast them for on-chain validation.

In other words, each device functions like a "mini blockchain node," performing its own computations, providing its own proofs, and only reporting the results to the chain for verification. In this mode, the role of the chain is no longer that of a "workhorse" but more like a "referee"; you claim you've done the calculations right, then you must provide verifiable proof.

This mode has several core changes: all executions are done locally, the chain's burden is minimal, and scalability is naturally strong. The generated ZK proof is lightweight, unlike the heavy batch proof of zkRollup, making it suitable for end-user devices to handle on their own. It is privacy-preserving by default, but developers can choose which computations to make public and which to keep private, allowing for flexible switching to adapt to different scenarios.

Ultimately, what it aims to create is not a large, all-encompassing Layer1 but rather a new way of interaction between the chain and devices, enabling smart contracts to run on-the-go like a mobile wallet.

This is quite distinct from the currently popular privacy chains in the market. For example, Aztec focuses on "ZK-rollup + encrypted EVM," still rolling up all user transactions for processing together, with a fairly centralized sequencer, essentially following a Layer2 approach. Fhenix uses TEE + homomorphic encryption, leaning more towards hardware trust + encrypted storage, with ZK playing a less prominent role.

On the other hand, 0xMiden has taken a "ZK-first + local computation" approach from the underlying logic, emphasizing flexibility, lightness, and end-user friendliness.

In simple terms, 0xMiden's execution is decentralized, to the extent that it can even be performed offline, proofs generated offline, and results subsequently uploaded collectively. Your phone, browser, AI chip—anything—could potentially become a small node running smart contracts, with ZK ensuring correct computations and the chain focusing solely on result verification.

Why Are Big Shots Willing to Splash the Cash?

As early as 2021, a16z invested in 0xMiden founder Bobbin Threadbare's earlier project, which was still part of Polygon Miden at that time. This recent $25 million seed round funding on April 29, 2025, with a16z participating again, highlights their long-term confidence in the Bobbin team.

On the team front, 0xMiden was founded by Bobbin Threadbare, Dominik Schmid, and Azeem Khan, all of whom have previously served on Meta's blockchain team, bringing deep expertise in zero-knowledge proofs and blockchain development.

0xMiden was originally a project developed under Polygon Labs and split into an independent entity on March 31, 2025, with this funding seen as a "team restructuring + independent financing." After the split, 0xMiden focuses on an Ethereum zk-Rollup privacy solution, with CryptoRank as the incubator providing funding and resource support, but the technical development is mainly carried out independently by the team.

0xMiden is the third project to split from Polygon after Avail and Privado ID. Sandeep Nailwal, co-founder of Polygon Labs, said in a statement, "It plans to airdrop around 10% of its native token to POL holders and stakers, directly rewarding the ecosystem that has helped its development."

From an investment perspective, 0xMiden's appeal lies in its ZK native computation model, representing the future trend of ZK. Unlike traditional Rollups, it is not a substitute for the chain but a developed privacy plug-in, offering flexible privacy options.

Project Status

Meanwhile, Miden has already launched practical development tools, allowing developers to start writing real smart contracts, moving away from projects that remain only at the conceptual stage. More importantly, its design supports "default privacy, optionally public," with some room for compliance.

The mainnet has not yet launched, but the VM and SDK are already open-source on Github. The roadmap they have provided is as follows:

· Miden VM open-source (completed)

· Developer Toolkit SDK release (completed)

· Testnet launch (expected in Q3 2024)

· Mainnet launch (earliest possible in early 2025)

Some developers are now using the Miden VM to write demo contracts, such as local voting, device log verification, in-game asset operations, and other scenarios. However, to truly "break through," it may still require a "killer-level" application scenario like a "local version of Friend.tech" or an "AI model execution marketplace."

Privacy Blockchain: Why Is It Getting Hot Again?

This narrative is not new, but it has indeed seen a bit of a resurgence recently, driven by three core reasons.

First, regulatory pressure is on the rise. Globally, regulatory scrutiny on cryptographic identity and asset movement is becoming increasingly stringent. Whether it's on-chain KYC, wallet blacklists, or exchange compliance, the space for "absolute anonymity" is being continuously squeezed. Instead, there is a growing demand for privacy oriented towards institutions, compliance-friendly solutions, and controllable privacy, especially in enterprise-level scenarios, where selective privacy has become a necessity.

Second, ZK technology has finally become "usable." In the past few years, ZK has been stuck in the "tech demo" stage, being expensive, slow, and difficult to develop. However, with the maturity of technologies like STARK, SNARK, the cost of proof generation and verification continues to decrease, turning ZK from a "theoretical future" into a "real-world runnable reality."

Third, the rise of AI blockchain applications has seen more and more AI computations, data on-chain, edge inferences, and other scenarios being implemented, expanding the need for privacy from not just transaction privacy but also to "data privacy" and "model privacy."

These applications' privacy requirements are no longer about "full-chain black boxes" but about "on-device computation + selective encryption," which is known as localized privacy.

Meanwhile, traditional privacy projects like Monero and Zcash, which support only simple transactions, are increasingly under regulatory scrutiny. The path of promoting "absolute anonymity" has become more and more challenging.

So, a new opportunity has emerged, moving away from absolute secrecy towards "on-device computation + selective privacy."

Will this round of the privacy narrative start from the "on-device"?

The direction of privacy blockchains will not see an immediate explosion, as a truly runnable solution has always been missing.

Projects like Aztec and Fhenix are still focused on "on-chain privacy," while 0xMiden aims to take this narrative to the "off-chain" device-side, with autonomous operation and selective on-chain interactions.

This perspective is actually the next natural evolution of ZK, aligning with future trends such as "AI + blockchain," "data sovereignty," and more. If this story can be effectively communicated and the product can truly be implemented, then 0xMiden may become the next noteworthy "privacy computing infrastructure."

Of course, the prerequisite is that it can survive until the day it goes live on the mainnet.

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China's Central Bank and Eight Other Departments' Latest Regulatory Focus: Key Attention to RWA Tokenized Asset Risk


Foreword: Today, the People's Bank of China's website published the "Notice of the People's Bank of China, National Development and Reform Commission, Ministry of Industry and Information Technology, Ministry of Public Security, State Administration for Market Regulation, China Banking and Insurance Regulatory Commission, China Securities Regulatory Commission, State Administration of Foreign Exchange on Further Preventing and Dealing with Risks Related to Virtual Currency and Others (Yinfa [2026] No. 42)", the latest regulatory requirements from the eight departments including the central bank, which are basically consistent with the regulatory requirements of recent years. The main focus of the regulation is on speculative activities such as virtual currency trading, exchanges, ICOs, overseas platform services, and this time, regulatory oversight of RWA has been added, explicitly prohibiting RWA tokenization, stablecoins (especially those pegged to the RMB). The following is the full text:


To the people's governments of all provinces, autonomous regions, and municipalities directly under the Central Government, the Xinjiang Production and Construction Corps:


  Recently, there have been speculative activities related to virtual currency and Real-World Assets (RWA) tokenization, disrupting the economic and financial order and jeopardizing the property security of the people. In order to further prevent and address the risks related to virtual currency and Real-World Assets tokenization, effectively safeguard national security and social stability, in accordance with the "Law of the People's Republic of China on the People's Bank of China," "Law of the People's Republic of China on Commercial Banks," "Securities Law of the People's Republic of China," "Law of the People's Republic of China on Securities Investment Funds," "Law of the People's Republic of China on Futures and Derivatives," "Cybersecurity Law of the People's Republic of China," "Regulations of the People's Republic of China on the Administration of Renminbi," "Regulations on Prevention and Disposal of Illegal Fundraising," "Regulations of the People's Republic of China on Foreign Exchange Administration," "Telecommunications Regulations of the People's Republic of China," and other provisions, after reaching consensus with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, and with the approval of the State Council, the relevant matters are notified as follows:


  I. Clarify the essential attributes of virtual currency, Real-World Assets tokenization, and related business activities


  (I) Virtual currency does not possess the legal status equivalent to fiat currency. Virtual currencies such as Bitcoin, Ether, Tether, etc., have the main characteristics of being issued by non-monetary authorities, using encryption technology and distributed ledger or similar technology, existing in digital form, etc. They do not have legal tender status, should not and cannot be circulated and used as currency in the market.


  The business activities related to virtual currency are classified as illegal financial activities. The exchange of fiat currency and virtual currency within the territory, exchange of virtual currencies, acting as a central counterparty in buying and selling virtual currencies, providing information intermediary and pricing services for virtual currency transactions, token issuance financing, and trading of virtual currency-related financial products, etc., fall under illegal financial activities, such as suspected illegal issuance of token vouchers, unauthorized public issuance of securities, illegal operation of securities and futures business, illegal fundraising, etc., are strictly prohibited across the board and resolutely banned in accordance with the law. Overseas entities and individuals are not allowed to provide virtual currency-related services to domestic entities in any form.


  A stablecoin pegged to a fiat currency indirectly fulfills some functions of the fiat currency in circulation. Without the consent of relevant authorities in accordance with the law and regulations, any domestic or foreign entity or individual is not allowed to issue a RMB-pegged stablecoin overseas.


(II)Tokenization of Real-World Assets refers to the use of encryption technology and distributed ledger or similar technologies to transform ownership rights, income rights, etc., of assets into tokens (tokens) or other interests or bond certificates with token (token) characteristics, and carry out issuance and trading activities.


  Engaging in the tokenization of real-world assets domestically, as well as providing related intermediary, information technology services, etc., which are suspected of illegal issuance of token vouchers, unauthorized public offering of securities, illegal operation of securities and futures business, illegal fundraising, and other illegal financial activities, shall be prohibited; except for relevant business activities carried out with the approval of the competent authorities in accordance with the law and regulations and relying on specific financial infrastructures. Overseas entities and individuals are not allowed to illegally provide services related to the tokenization of real-world assets to domestic entities in any form.


  II. Sound Work Mechanism


  (III) Inter-agency Coordination. The People's Bank of China, together with the National Development and Reform Commission, the Ministry of Industry and Information Technology, the Ministry of Public Security, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the China Securities Regulatory Commission, the State Administration of Foreign Exchange, and other departments, will improve the work mechanism, strengthen coordination with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, coordinate efforts, and overall guide regions to carry out risk prevention and disposal of virtual currency-related illegal financial activities.


  The China Securities Regulatory Commission, together with the National Development and Reform Commission, the Ministry of Industry and Information Technology, the Ministry of Public Security, the People's Bank of China, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the State Administration of Foreign Exchange, and other departments, will improve the work mechanism, strengthen coordination with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, coordinate efforts, and overall guide regions to carry out risk prevention and disposal of illegal financial activities related to the tokenization of real-world assets.


  (IV) Strengthening Local Implementation. The people's governments at the provincial level are overall responsible for the prevention and disposal of risks related to virtual currencies and the tokenization of real-world assets in their respective administrative regions. The specific leading department is the local financial regulatory department, with participation from branches and dispatched institutions of the State Council's financial regulatory department, telecommunications regulators, public security, market supervision, and other departments, in coordination with cyberspace departments, courts, and procuratorates, to improve the normalization of the work mechanism, effectively connect with the relevant work mechanisms of central departments, form a cooperative and coordinated working pattern between central and local governments, effectively prevent and properly handle risks related to virtual currencies and the tokenization of real-world assets, and maintain economic and financial order and social stability.


  III. Strengthened Risk Monitoring, Prevention, and Disposal


  (5) Enhanced Risk Monitoring. The People's Bank of China, China Securities Regulatory Commission, National Development and Reform Commission, Ministry of Industry and Information Technology, Ministry of Public Security, State Administration of Foreign Exchange, Cyberspace Administration of China, and other departments continue to improve monitoring techniques and system support, enhance cross-departmental data analysis and sharing, establish sound information sharing and cross-validation mechanisms, promptly grasp the risk situation of activities related to virtual currency and real-world asset tokenization. Local governments at all levels give full play to the role of local monitoring and early warning mechanisms. Local financial regulatory authorities, together with branches and agencies of the State Council's financial regulatory authorities, as well as departments of cyberspace and public security, ensure effective connection between online monitoring, offline investigation, and fund tracking, efficiently and accurately identify activities related to virtual currency and real-world asset tokenization, promptly share risk information, improve early warning information dissemination, verification, and rapid response mechanisms.


  (6) Strengthened Oversight of Financial Institutions, Intermediaries, and Technology Service Providers. Financial institutions (including non-bank payment institutions) are prohibited from providing account opening, fund transfer, and clearing services for virtual currency-related business activities, issuing and selling financial products related to virtual currency, including virtual currency and related financial products in the scope of collateral, conducting insurance business related to virtual currency, or including virtual currency in the scope of insurance liability. Financial institutions (including non-bank payment institutions) are prohibited from providing custody, clearing, and settlement services for unauthorized real-world asset tokenization-related business and related financial products. Relevant intermediary institutions and information technology service providers are prohibited from providing intermediary, technical, or other services for unauthorized real-world asset tokenization-related businesses and related financial products.


  (7) Enhanced Management of Internet Information Content and Access. Internet enterprises are prohibited from providing online business venues, commercial displays, marketing, advertising, or paid traffic diversion services for virtual currency and real-world asset tokenization-related business activities. Upon discovering clues of illegal activities, they should promptly report to relevant departments and provide technical support and assistance for related investigations and inquiries. Based on the clues transferred by the financial regulatory authorities, the cyberspace administration, telecommunications authorities, and public security departments should promptly close and deal with websites, mobile applications (including mini-programs), and public accounts engaged in virtual currency and real-world asset tokenization-related business activities in accordance with the law.


  (8) Strengthened Entity Registration and Advertisement Management. Market supervision departments strengthen entity registration and management, and enterprise and individual business registrations must not contain terms such as "virtual currency," "virtual asset," "cryptocurrency," "crypto asset," "stablecoin," "real-world asset tokenization," or "RWA" in their names or business scopes. Market supervision departments, together with financial regulatory authorities, legally enhance the supervision of advertisements related to virtual currency and real-world asset tokenization, promptly investigating and handling relevant illegal advertisements.


  (IX) Continued Rectification of Virtual Currency Mining Activities. The National Development and Reform Commission, together with relevant departments, strictly controls virtual currency mining activities, continuously promotes the rectification of virtual currency mining activities. The people's governments of various provinces take overall responsibility for the rectification of "mining" within their respective administrative regions. In accordance with the requirements of the National Development and Reform Commission and other departments in the "Notice on the Rectification of Virtual Currency Mining Activities" (NDRC Energy-saving Building [2021] No. 1283) and the provisions of the "Guidance Catalog for Industrial Structure Adjustment (2024 Edition)," a comprehensive review, investigation, and closure of existing virtual currency mining projects are conducted, new mining projects are strictly prohibited, and mining machine production enterprises are strictly prohibited from providing mining machine sales and other services within the country.


  (X) Severe Crackdown on Related Illegal Financial Activities. Upon discovering clues to illegal financial activities related to virtual currency and the tokenization of real-world assets, local financial regulatory authorities, branches of the State Council's financial regulatory authorities, and other relevant departments promptly investigate, determine, and properly handle the issues in accordance with the law, and seriously hold the relevant entities and individuals legally responsible. Those suspected of crimes are transferred to the judicial authorities for processing according to the law.


 (XI) Severe Crackdown on Related Illegal and Criminal Activities. The Ministry of Public Security, the People's Bank of China, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the China Securities Regulatory Commission, as well as judicial and procuratorial organs, in accordance with their respective responsibilities, rigorously crack down on illegal and criminal activities related to virtual currency, the tokenization of real-world assets, such as fraud, money laundering, illegal business operations, pyramid schemes, illegal fundraising, and other illegal and criminal activities carried out under the guise of virtual currency, the tokenization of real-world assets, etc.


  (XII) Strengthen Industry Self-discipline. Relevant industry associations should enhance membership management and policy advocacy, based on their own responsibilities, advocate and urge member units to resist illegal financial activities related to virtual currency and the tokenization of real-world assets. Member units that violate regulatory policies and industry self-discipline rules are to be disciplined in accordance with relevant self-regulatory management regulations. By leveraging various industry infrastructure, conduct risk monitoring related to virtual currency, the tokenization of real-world assets, and promptly transfer issue clues to relevant departments.


  IV. Strict Supervision of Domestic Entities Engaging in Overseas Business Activities


(XIII) Without the approval of relevant departments in accordance with the law and regulations, domestic entities and foreign entities controlled by them may not issue virtual currency overseas.


  (XIV) Domestic entities engaging directly or indirectly in overseas external debt-based tokenization of real-world assets, or conducting asset securitization activities abroad based on domestic ownership rights, income rights, etc. (hereinafter referred to as domestic equity), should be strictly regulated in accordance with the principles of "same business, same risk, same rules." The National Development and Reform Commission, the China Securities Regulatory Commission, the State Administration of Foreign Exchange, and other relevant departments regulate it according to their respective responsibilities. For other forms of overseas real-world asset tokenization activities based on domestic equity by domestic entities, the China Securities Regulatory Commission, together with relevant departments, supervise according to their division of responsibilities. Without the consent and filing of relevant departments, no unit or individual may engage in the above-mentioned business.


  (15) Overseas subsidiaries and branches of domestic financial institutions providing Real World Asset Tokenization-related services overseas shall do so legally and prudently. They shall have professional personnel and systems in place to effectively mitigate business risks, strictly implement customer onboarding, suitability management, anti-money laundering requirements, and incorporate them into the domestic financial institutions' compliance and risk management system. Intermediaries and information technology service providers offering Real World Asset Tokenization services abroad based on domestic equity or conducting Real World Asset Tokenization business in the form of overseas debt for domestic entities directly or indirectly venturing abroad must strictly comply with relevant laws and regulations. They should establish and improve relevant compliance and internal control systems in accordance with relevant normative requirements, strengthen business and risk control, and report the business developments to the relevant regulatory authorities for approval or filing.


  V. Strengthen Organizational Implementation


  (16) Strengthen organizational leadership and overall coordination. All departments and regions should attach great importance to the prevention of risks related to virtual currencies and Real World Asset Tokenization, strengthen organizational leadership, clarify work responsibilities, form a long-term effective working mechanism with centralized coordination, local implementation, and shared responsibilities, maintain high pressure, dynamically monitor risks, effectively prevent and mitigate risks in an orderly and efficient manner, legally protect the property security of the people, and make every effort to maintain economic and financial order and social stability.


  (17) Widely carry out publicity and education. All departments, regions, and industry associations should make full use of various media and other communication channels to disseminate information through legal and policy interpretation, analysis of typical cases, and education on investment risks, etc. They should promote the illegality and harm of virtual currencies and Real World Asset Tokenization-related businesses and their manifestations, fully alert to potential risks and hidden dangers, and enhance public awareness and identification capabilities for risk prevention.


  VI. Legal Responsibility


  (18) Engaging in illegal financial activities related to virtual currencies and Real World Asset Tokenization in violation of this notice, as well as providing services for virtual currencies and Real World Asset Tokenization-related businesses, shall be punished in accordance with relevant regulations. If it constitutes a crime, criminal liability shall be pursued according to the law. For domestic entities and individuals who knowingly or should have known that overseas entities illegally provided virtual currency or Real World Asset Tokenization-related services to domestic entities and still assisted them, relevant responsibilities shall be pursued according to the law. If it constitutes a crime, criminal liability shall be pursued according to the law.


  (19) If any unit or individual invests in virtual currencies, Real World Asset Tokens, and related financial products against public order and good customs, the relevant civil legal actions shall be invalid, and any resulting losses shall be borne by them. If there are suspicions of disrupting financial order and jeopardizing financial security, the relevant departments shall deal with them according to the law.


  This notice shall enter into force upon the date of its issuance. The People's Bank of China and ten other departments' "Notice on Further Preventing and Dealing with the Risks of Virtual Currency Trading Speculation" (Yinfa [2021] No. 237) is hereby repealed.


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