KB Kookmin Card Files Patent for Hybrid Payment Technology

TLDR

• KB Kookmin Card filed a patent on April 10, 2025.
• The technology links blockchain e-wallets to credit card accounts.
• Industry task force aims to develop stablecoin payment systems.

KB Kookmin Card, a subsidiary of KB Financial Group, has filed a patent on April 10, 2025, for a novel hybrid digital asset payment technology. This technology connects a customer’s blockchain e-wallet, focusing primarily on stablecoins, to their existing credit card accounts. This integration aims to facilitate seamless transactions, automatically defaulting to the credit facility if the stablecoin balance is insufficient.

The company’s move aligns with the broader trend within the financial industry, seen in efforts like the February 2025 task force led by the Credit Finance Association. This group, consisting of nine card issuers, is working towards the development of stablecoin payment systems for consumer transactions and merchant settlements.

Background of KB Financial Group’s Crypto Investments

KB Financial Group has a history of investing in blockchain technology, operating in South Korea’s mature crypto market. Existing regulations, such as the Travel Rule and the Virtual Asset User Protection Act, provide a structured environment for these advancements. This latest patent filing coincides with KB’s strategy to explore blockchain research and development, although no specific funding details or financial impact have been disclosed.

Within the same industry, BC Card has launched successful stablecoin pilot projects, allowing foreign users to convert digital assets into prepaid digital cards through overseas wallets. As of early 2026, BC Card has established a dedicated digital asset subsidiary and continues to secure related patents.

Stablecoin Integration Among Card Issuers

The efforts by KB Kookmin Card and other card issuers are part of a larger movement, reflecting trends seen in similar initiatives by South Korean card firms. Notably, BC Card’s stablecoin payment trials for foreign users were completed by the end of 2023, with developments continuing into 2026 with USDC in focus.

The task force’s activities indicate continued interest in digital asset incorporation by prominent card issuers like Samsung, Shinhan, Hyundai, Lotte, Hana, Woori, BC, and NH Nonghyup. Their work involves designing infrastructure supporting stablecoin transactions at the consumer and merchant level.

Industry Expert Insights on Patent Development

Commentary from industry experts sheds light on the new patent’s significance. Dr. Soo-Min Lee, a fintech researcher at Seoul National University, noted that “The true barrier to crypto payments has rarely been the blockchain itself, but rather its connection to the legacy financial world. A patent that systematically solves for hybrid settlement at the point of sale, especially from a major card issuer, represents a concrete step toward solving the last-mile problem for digital assets.”

The patent’s strategy to integrate blockchain wallets with conventional credit systems is viewed as an important advancement in bridging the gap between digital asset capabilities and traditional financial frameworks. This innovation highlights the ongoing evolution and adaptation within the financial industry.