Upbit Bithumb Sanctions Probe Intensifies Over Order Book Sharing Data Privacy Breach

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Upbit Bithumb Sanctions Probe Intensifies Over Order Book Sharing Data Privacy Breach

South Korea’s Upbit Bithumb sanctions probe has escalated as the Personal Information Protection Commission (PIPC) nears a decision on whether the two largest crypto exchanges illegally transferred personal data abroad through order book sharing. This investigation, reported by SBS Biz on June 12, 2025, in Seoul, follows months of on-site inspections and could reshape data handling practices across the nation’s digital asset industry.

What Is the Upbit Bithumb Sanctions Probe About?

The PIPC’s probe centers on the practice of sharing order book data with overseas exchange partners. Order books contain detailed records of buy and sell orders, including timestamps, prices, and volumes. When shared internationally, this data may include personal identifiers linked to user accounts.

Regulators suspect that Upbit and Bithumb failed to obtain proper consent or implement adequate safeguards before transferring this data abroad. The Personal Information Protection Act (PIPA) requires explicit user consent for cross-border data transfers, with strict penalties for violations.

Timeline of the Investigation

The investigation began in early 2025. Here is a timeline of key events:

• January 2025: PIPC launches a preliminary inquiry into order book sharing practices at major exchanges.
• March 2025: On-site inspections begin at Upbit and Bithumb headquarters in Seoul.
• May 2025: PIPC collects evidence and interviews key personnel.
• June 2025: Final review stage; sanctions decision is pending.

This timeline shows the methodical approach of South Korean regulators. They are not rushing the process. They want a thorough examination of all evidence.

Potential Sanctions and Their Impact

If the PIPC finds a violation, potential sanctions include fines up to 3% of annual revenue, criminal referrals, or corrective orders. For Upbit and Bithumb, which dominate the Korean crypto market with combined daily trading volumes exceeding $5 billion, the financial impact could be substantial.

Beyond fines, a sanctions decision would damage public trust. Users may question the safety of their personal data. This could trigger a shift in market share to smaller, more privacy-conscious exchanges or even to decentralized platforms.

Why Order Book Sharing Matters for User Privacy

Order book data, when aggregated, reveals trading patterns and strategies. However, when linked to user accounts, it becomes personally identifiable information (PII). Sharing this data with overseas partners—often in jurisdictions with weaker privacy laws—exposes users to risks like identity theft or unauthorized surveillance.

Experts like privacy lawyer Kim Min-ji note that “the volume of data shared is enormous. Even anonymized data can be re-identified using advanced techniques.” This concern drives the PIPC’s strict interpretation of PIPA.

Broader Context: South Korea’s Crypto Regulation Landscape

South Korea has a history of stringent crypto regulation. The 2021 Travel Rule required exchanges to implement know-your-customer (KYC) protocols. The 2023 Virtual Asset User Protection Act imposed custody and disclosure requirements. This probe adds another layer of compliance.

The PIPC’s actions align with global trends. The European Union’s General Data Protection Regulation (GDPR) and China’s Personal Information Protection Law (PIPL) also restrict cross-border data flows. South Korea is positioning itself as a leader in crypto data privacy.

How Upbit and Bithumb Responded

Both exchanges have publicly stated their cooperation with the investigation. Upbit issued a statement saying it “fully complies with all applicable laws and has implemented robust data protection measures.” Bithumb similarly affirmed its commitment to user privacy.

However, industry insiders suggest the exchanges may have underestimated the regulatory scrutiny. Order book sharing was once seen as a routine operational practice. Now, it is a focal point for data privacy enforcement.

Comparative Table: Upbit vs. Bithumb

This table highlights the scale difference. Upbit’s larger volume means a broader data footprint. Its multiple overseas partners increase the complexity of compliance.

What This Means for Crypto Users

For individual traders, this probe serves as a reminder to review exchange privacy policies. Users should understand where their data goes and how it is protected. The PIPC’s decision could set a precedent for how all Korean exchanges handle cross-border data transfers.

If sanctions are imposed, users may see changes in exchange services. Some features, like advanced order types that rely on shared liquidity, might be restricted. Alternatively, exchanges may introduce new consent pop-ups or data localization measures.

Conclusion

The Upbit Bithumb sanctions probe represents a critical test of South Korea’s data privacy enforcement in the crypto sector. As the PIPC finalizes its decision, the outcome will influence not only these two exchanges but also the broader industry’s approach to international data sharing. Users and stakeholders should monitor this case closely. It underscores the growing intersection of crypto operations and privacy regulation worldwide.

FAQs

Q1: What is the Upbit Bithumb sanctions probe about?
The probe investigates whether Upbit and Bithumb illegally transferred personal data abroad through order book sharing with overseas exchange partners, violating South Korea’s Personal Information Protection Act.

Q2: What is order book sharing?
Order book sharing involves exchanging data about buy and sell orders between exchanges. This data can include timestamps, prices, volumes, and potentially user identifiers.

Q3: What penalties could Upbit and Bithumb face?
Penalties include fines up to 3% of annual revenue, criminal referrals, or corrective orders from the Personal Information Protection Commission.

Q4: How does this affect crypto users in South Korea?
Users may face changes in exchange services, new consent requirements, or potential data exposure. The case also highlights the importance of reviewing exchange privacy policies.

Q5: When will the PIPC announce its decision?
The PIPC is in the final review stage as of June 2025. A decision is expected within weeks, though no official deadline has been set.

Q6: Are other exchanges under investigation?
Currently, only Upbit and Bithumb are publicly named. However, the PIPC may expand its probe to other exchanges if evidence warrants further investigation.

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