Privacy Boost is now deployed on OP Mainnet and Soneium, marking a significant step in bringing confidential transactions to the OP Stack.
The deployment sets the stage for Toss to run a won-linked stablecoin trial reaching approximately 30 million users in South Korea. Toss, which handles financial transactions for two-thirds of South Korea, partnered with Optimism to explore blockchain-based digital finance infrastructure.
Key features of Privacy Boost:
- Encrypts transfers and contract logic while maintaining transaction auditability for compliance
- Supports pre-confirmations, enabling private transfers within one second
- Provides institutions with privacy while allowing regulators to maintain oversight
The three-month proof of concept will test whether the Won can settle onchain while meeting Korea's strict compliance, privacy, and control requirements. This represents a practical test case for tokenized finance with built-in confidentiality from the start.
More details: Cointelegraph coverage | Optimism blog
Programmable compliance on the OP Stack means you decide who gets in, what stays private, and what gets screened before a single transaction hits.
Privacy Boost, the first privacy offering for OP Stack chains, now supports pre-confirmations. Private transfers become usable within a second while settlement continues in the background.
Privacy Boost now supports preconfirmation. Private transfers no longer have to wait for full onchain settlement before they can be used again. If you鈥檙e building on private payments, this changes what you can ship.
OP Enterprise Simplifies Blockchain Adoption for Korean Financial Institutions
**Optimism is making moves in Korea's financial sector.** Kyle Jenke from the Optimism team appeared on Hankyung TV to discuss OP Enterprise and its role in helping Korean financial institutions integrate blockchain technology. **Key developments:** - The Optimism team spent the week in Korea exploring onchain finance opportunities for the country's financial system - Discussion centered on a proof-of-concept for a Korean won stablecoin built on the OP Stack - Partnership with Toss, a major Korean fintech company, on the stablecoin initiative OP Enterprise appears designed to lower technical barriers for traditional financial institutions looking to adopt blockchain infrastructure.
Toss Explores Bringing South Korean Won Onchain
**Toss, South Korea's dominant payment platform serving two-thirds of the country's population, is exploring putting the won onchain.** The financial technology company is investigating blockchain integration for the Korean currency. This move could represent a significant step toward mainstream adoption of onchain finance in one of Asia's most technologically advanced markets. Toss's exploration comes as the company continues to dominate South Korea's digital payment landscape. The platform's massive user base positions it as a potential bridge between traditional finance and blockchain technology. Details about the implementation timeline and technical approach are outlined in [Optimism's blog post](http://optimism.io/blog/two-thirds-of-south-korea-runs-its-money-through-toss-now-toss-is-exploring-putting-the-won-onchain).
Toss Explores Onchain Won Stablecoin for 30M Korean Users
**South Korea's largest fintech app Toss is exploring an onchain Won stablecoin in partnership with Optimism.** Toss serves over 30 million users鈥攖wo-thirds of South Korea's population鈥攚ho manage banking, payments, investing, credit, and taxes through the platform. **Key implications:** - Korea has 16 million active crypto traders, creating significant existing demand - A Toss-sized stablecoin would become one of the largest regulated onchain money experiments globally - The stablecoin would operate within an app most Koreans already use daily The memorandum of understanding (MOU) between Toss and Optimism marks a potential shift toward mainstream blockchain adoption in one of crypto's most active markets.
Korea Tests Regulated Stablecoin with Privacy and Compliance Features

A proof-of-concept test is underway for a Korean Won-backed stablecoin that combines regulatory compliance with blockchain privacy. **Key Components Being Tested:** - OP Enterprise for settlement control - KYC and AML systems built to Korean regulatory standards - Sunnyside Labs' @PrivacyBoost for private transactions on public networks The test, involving Optimism, @PrivacyBoost, and @toss__official, runs over three months to determine if digital money can settle onchain while meeting Korea's requirements for compliance, privacy, and institutional control.
The Billion User Moment Nobody Will See Coming
Optimism explores how blockchain adoption will reach a billion users not through hype, but through invisible integration into everyday applications. **Key insights:** - Mass adoption won't announce itself - users will interact with blockchain technology without realizing it - The focus shifts from crypto-native applications to embedding blockchain infrastructure into mainstream services - Success means the technology becomes invisible, working seamlessly in the background - Optimism positions itself as the scaling solution enabling this quiet revolution Read the full analysis: [The Billion User Moment](https://optimism.io/blog/the-billion-user-moment-nobody-will-see-coming)